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Finding the Fourth Proportional to 587.72, 881.70 and 279.61

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Solution

The fourth proportional to 587.72, 881.70 and 279.61 is: 419.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.72 : 881.70 = 279.61 : x
  2. Step 2: Convert to fraction form
    587.72/881.70 = 279.61/x
  3. Step 3: Cross multiply
    587.72x = 881.70 × 279.61
  4. Step 4: Simplify right side
    587.72x = 246,532.14
  5. Step 5: Solve for x
    x = 246,532.14/587.72
  6. Step 6: Final answer
    x = 419.47

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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.