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Finding the Fourth Proportional to 612,103,138.20, 918,154,707.30 and 612,103,138.20

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Solution

The fourth proportional to 612,103,138.20, 918,154,707.30 and 612,103,138.20 is: 918,154,707.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,103,138.20 : 918,154,707.30 = 612,103,138.20 : x
  2. Step 2: Convert to fraction form
    612,103,138.20/918,154,707.30 = 612,103,138.20/x
  3. Step 3: Cross multiply
    612,103,138.20x = 918,154,707.30 × 612,103,138.20
  4. Step 4: Simplify right side
    612,103,138.20x = 562,005,377,691,432,448
  5. Step 5: Solve for x
    x = 562,005,377,691,432,448/612,103,138.20
  6. Step 6: Final answer
    x = 918,154,707.30

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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.