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Finding the Fourth Proportional to 391,443.80, 587,261.70 and 181,037.40

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Solution

The fourth proportional to 391,443.80, 587,261.70 and 181,037.40 is: 271,600.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,443.80 : 587,261.70 = 181,037.40 : x
  2. Step 2: Convert to fraction form
    391,443.80/587,261.70 = 181,037.40/x
  3. Step 3: Cross multiply
    391,443.80x = 587,261.70 × 181,037.40
  4. Step 4: Simplify right side
    391,443.80x = 106,316,331,287.58
  5. Step 5: Solve for x
    x = 106,316,331,287.58/391,443.80
  6. Step 6: Final answer
    x = 271,600.50

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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.