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Finding the Fourth Proportional to 286,327.30, 429,381.60 and 86,581.30

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Solution

The fourth proportional to 286,327.30, 429,381.60 and 86,581.30 is: 129,838.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,327.30 : 429,381.60 = 86,581.30 : x
  2. Step 2: Convert to fraction form
    286,327.30/429,381.60 = 86,581.30/x
  3. Step 3: Cross multiply
    286,327.30x = 429,381.60 × 86,581.30
  4. Step 4: Simplify right side
    286,327.30x = 37,176,417,124.08
  5. Step 5: Solve for x
    x = 37,176,417,124.08/286,327.30
  6. Step 6: Final answer
    x = 129,838.88

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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.