Home / 278,285.76-417,489.12-91,290.24

Finding the Fourth Proportional to 278,285.76, 417,489.12 and 91,290.24

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Solution

The fourth proportional to 278,285.76, 417,489.12 and 91,290.24 is: 136,955.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,285.76 : 417,489.12 = 91,290.24 : x
  2. Step 2: Convert to fraction form
    278,285.76/417,489.12 = 91,290.24/x
  3. Step 3: Cross multiply
    278,285.76x = 417,489.12 × 91,290.24
  4. Step 4: Simplify right side
    278,285.76x = 38,112,681,962.19
  5. Step 5: Solve for x
    x = 38,112,681,962.19/278,285.76
  6. Step 6: Final answer
    x = 136,955.20

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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.