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Finding the Fourth Proportional to 557,978.20, 770,006.70 and 316,306.36

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Solution

The fourth proportional to 557,978.20, 770,006.70 and 316,306.36 is: 436,500.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,978.20 : 770,006.70 = 316,306.36 : x
  2. Step 2: Convert to fraction form
    557,978.20/770,006.70 = 316,306.36/x
  3. Step 3: Cross multiply
    557,978.20x = 770,006.70 × 316,306.36
  4. Step 4: Simplify right side
    557,978.20x = 243,558,016,452.61
  5. Step 5: Solve for x
    x = 243,558,016,452.61/557,978.20
  6. Step 6: Final answer
    x = 436,500.95

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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.