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Finding the Fourth Proportional to 585.48, 877.26 and 431.72

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Solution

The fourth proportional to 585.48, 877.26 and 431.72 is: 646.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.48 : 877.26 = 431.72 : x
  2. Step 2: Convert to fraction form
    585.48/877.26 = 431.72/x
  3. Step 3: Cross multiply
    585.48x = 877.26 × 431.72
  4. Step 4: Simplify right side
    585.48x = 378,730.69
  5. Step 5: Solve for x
    x = 378,730.69/585.48
  6. Step 6: Final answer
    x = 646.87

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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.