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Finding the Fourth Proportional to 587.32, 878.88 and 432.88

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Solution

The fourth proportional to 587.32, 878.88 and 432.88 is: 647.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.32 : 878.88 = 432.88 : x
  2. Step 2: Convert to fraction form
    587.32/878.88 = 432.88/x
  3. Step 3: Cross multiply
    587.32x = 878.88 × 432.88
  4. Step 4: Simplify right side
    587.32x = 380,449.57
  5. Step 5: Solve for x
    x = 380,449.57/587.32
  6. Step 6: Final answer
    x = 647.77

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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.