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Finding the Fourth Proportional to 391,729.15, 587,646.04 and 155,016.51

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Solution

The fourth proportional to 391,729.15, 587,646.04 and 155,016.51 is: 232,545.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,729.15 : 587,646.04 = 155,016.51 : x
  2. Step 2: Convert to fraction form
    391,729.15/587,646.04 = 155,016.51/x
  3. Step 3: Cross multiply
    391,729.15x = 587,646.04 × 155,016.51
  4. Step 4: Simplify right side
    391,729.15x = 91,094,838,236.12
  5. Step 5: Solve for x
    x = 91,094,838,236.12/391,729.15
  6. Step 6: Final answer
    x = 232,545.47

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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.