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Finding the Fourth Proportional to 391,175.46, 586,854.72 and 121,289.40

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Solution

The fourth proportional to 391,175.46, 586,854.72 and 121,289.40 is: 181,962.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,175.46 : 586,854.72 = 121,289.40 : x
  2. Step 2: Convert to fraction form
    391,175.46/586,854.72 = 121,289.40/x
  3. Step 3: Cross multiply
    391,175.46x = 586,854.72 × 121,289.40
  4. Step 4: Simplify right side
    391,175.46x = 71,179,256,875.97
  5. Step 5: Solve for x
    x = 71,179,256,875.97/391,175.46
  6. Step 6: Final answer
    x = 181,962.48

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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.