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Finding the Fourth Proportional to 558,759.80, 838,139.70 and 402,462.20

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Solution

The fourth proportional to 558,759.80, 838,139.70 and 402,462.20 is: 603,693.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,759.80 : 838,139.70 = 402,462.20 : x
  2. Step 2: Convert to fraction form
    558,759.80/838,139.70 = 402,462.20/x
  3. Step 3: Cross multiply
    558,759.80x = 838,139.70 × 402,462.20
  4. Step 4: Simplify right side
    558,759.80x = 337,319,547,569.34
  5. Step 5: Solve for x
    x = 337,319,547,569.34/558,759.80
  6. Step 6: Final answer
    x = 603,693.30

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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.