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Finding the Fourth Proportional to 658,406.10, 987,937.20 and 374,314.80

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Solution

The fourth proportional to 658,406.10, 987,937.20 and 374,314.80 is: 561,658.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,406.10 : 987,937.20 = 374,314.80 : x
  2. Step 2: Convert to fraction form
    658,406.10/987,937.20 = 374,314.80/x
  3. Step 3: Cross multiply
    658,406.10x = 987,937.20 × 374,314.80
  4. Step 4: Simplify right side
    658,406.10x = 369,799,515,430.56
  5. Step 5: Solve for x
    x = 369,799,515,430.56/658,406.10
  6. Step 6: Final answer
    x = 561,658.70

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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.