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Finding the Fourth Proportional to 391,439.52, 586,712.16 and 166,470.12

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Solution

The fourth proportional to 391,439.52, 586,712.16 and 166,470.12 is: 249,515.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,439.52 : 586,712.16 = 166,470.12 : x
  2. Step 2: Convert to fraction form
    391,439.52/586,712.16 = 166,470.12/x
  3. Step 3: Cross multiply
    391,439.52x = 586,712.16 × 166,470.12
  4. Step 4: Simplify right side
    391,439.52x = 97,670,043,680.66
  5. Step 5: Solve for x
    x = 97,670,043,680.66/391,439.52
  6. Step 6: Final answer
    x = 249,515.03

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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.