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Finding the Fourth Proportional to 918,676,821.30, 1,378,015,231.95 and 918,676,821.30

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Solution

The fourth proportional to 918,676,821.30, 1,378,015,231.95 and 918,676,821.30 is: 1,378,015,231.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,676,821.30 : 1,378,015,231.95 = 918,676,821.30 : x
  2. Step 2: Convert to fraction form
    918,676,821.30/1,378,015,231.95 = 918,676,821.30/x
  3. Step 3: Cross multiply
    918,676,821.30x = 1,378,015,231.95 × 918,676,821.30
  4. Step 4: Simplify right side
    918,676,821.30x = 1,265,950,652,990,808,064
  5. Step 5: Solve for x
    x = 1,265,950,652,990,808,064/918,676,821.30
  6. Step 6: Final answer
    x = 1,378,015,231.95

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.