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Finding the Fourth Proportional to 639,266.80, 958,900.20 and 402,876.40

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Solution

The fourth proportional to 639,266.80, 958,900.20 and 402,876.40 is: 604,314.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,266.80 : 958,900.20 = 402,876.40 : x
  2. Step 2: Convert to fraction form
    639,266.80/958,900.20 = 402,876.40/x
  3. Step 3: Cross multiply
    639,266.80x = 958,900.20 × 402,876.40
  4. Step 4: Simplify right side
    639,266.80x = 386,318,260,535.28
  5. Step 5: Solve for x
    x = 386,318,260,535.28/639,266.80
  6. Step 6: Final answer
    x = 604,314.60

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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.