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Finding the Fourth Proportional to 680,658.55, 939,291.62 and 374,731.88

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Solution

The fourth proportional to 680,658.55, 939,291.62 and 374,731.88 is: 517,120.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,658.55 : 939,291.62 = 374,731.88 : x
  2. Step 2: Convert to fraction form
    680,658.55/939,291.62 = 374,731.88/x
  3. Step 3: Cross multiply
    680,658.55x = 939,291.62 × 374,731.88
  4. Step 4: Simplify right side
    680,658.55x = 351,982,508,060.73
  5. Step 5: Solve for x
    x = 351,982,508,060.73/680,658.55
  6. Step 6: Final answer
    x = 517,120.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.