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Finding the Fourth Proportional to 872,978.88, 1,204,711.68 and 491,006.40

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Solution

The fourth proportional to 872,978.88, 1,204,711.68 and 491,006.40 is: 677,589.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,978.88 : 1,204,711.68 = 491,006.40 : x
  2. Step 2: Convert to fraction form
    872,978.88/1,204,711.68 = 491,006.40/x
  3. Step 3: Cross multiply
    872,978.88x = 1,204,711.68 × 491,006.40
  4. Step 4: Simplify right side
    872,978.88x = 591,521,145,034.75
  5. Step 5: Solve for x
    x = 591,521,145,034.75/872,978.88
  6. Step 6: Final answer
    x = 677,589.30

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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.