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Finding the Fourth Proportional to 612,103,079.70, 918,154,619.55 and 612,103,079.70

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Solution

The fourth proportional to 612,103,079.70, 918,154,619.55 and 612,103,079.70 is: 918,154,619.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,103,079.70 : 918,154,619.55 = 612,103,079.70 : x
  2. Step 2: Convert to fraction form
    612,103,079.70/918,154,619.55 = 612,103,079.70/x
  3. Step 3: Cross multiply
    612,103,079.70x = 918,154,619.55 × 612,103,079.70
  4. Step 4: Simplify right side
    612,103,079.70x = 562,005,270,267,336,832
  5. Step 5: Solve for x
    x = 562,005,270,267,336,832/612,103,079.70
  6. Step 6: Final answer
    x = 918,154,619.55

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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.