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Finding the Fourth Proportional to 658,134.90, 987,202.35 and 429,812.10

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Solution

The fourth proportional to 658,134.90, 987,202.35 and 429,812.10 is: 644,718.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,134.90 : 987,202.35 = 429,812.10 : x
  2. Step 2: Convert to fraction form
    658,134.90/987,202.35 = 429,812.10/x
  3. Step 3: Cross multiply
    658,134.90x = 987,202.35 × 429,812.10
  4. Step 4: Simplify right side
    658,134.90x = 424,311,515,178.44
  5. Step 5: Solve for x
    x = 424,311,515,178.44/658,134.90
  6. Step 6: Final answer
    x = 644,718.15

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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.