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Finding the Fourth Proportional to 587.79, 885.71 and 487.32

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Solution

The fourth proportional to 587.79, 885.71 and 487.32 is: 734.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.79 : 885.71 = 487.32 : x
  2. Step 2: Convert to fraction form
    587.79/885.71 = 487.32/x
  3. Step 3: Cross multiply
    587.79x = 885.71 × 487.32
  4. Step 4: Simplify right side
    587.79x = 431,624.20
  5. Step 5: Solve for x
    x = 431,624.20/587.79
  6. Step 6: Final answer
    x = 734.32

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.