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Finding the Fourth Proportional to 658,404.10, 987,934.20 and 374,312.80

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Solution

The fourth proportional to 658,404.10, 987,934.20 and 374,312.80 is: 561,655.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,404.10 : 987,934.20 = 374,312.80 : x
  2. Step 2: Convert to fraction form
    658,404.10/987,934.20 = 374,312.80/x
  3. Step 3: Cross multiply
    658,404.10x = 987,934.20 × 374,312.80
  4. Step 4: Simplify right side
    658,404.10x = 369,796,416,617.76
  5. Step 5: Solve for x
    x = 369,796,416,617.76/658,404.10
  6. Step 6: Final answer
    x = 561,655.70

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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.