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Finding the Fourth Proportional to 391,019.61, 586,592.69 and 121,084.30

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Solution

The fourth proportional to 391,019.61, 586,592.69 and 121,084.30 is: 181,646.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,019.61 : 586,592.69 = 121,084.30 : x
  2. Step 2: Convert to fraction form
    391,019.61/586,592.69 = 121,084.30/x
  3. Step 3: Cross multiply
    391,019.61x = 586,592.69 × 121,084.30
  4. Step 4: Simplify right side
    391,019.61x = 71,027,165,253.77
  5. Step 5: Solve for x
    x = 71,027,165,253.77/391,019.61
  6. Step 6: Final answer
    x = 181,646.04

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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.