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Finding the Fourth Proportional to 577.60, 867.42 and 431.44

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Solution

The fourth proportional to 577.60, 867.42 and 431.44 is: 647.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.60 : 867.42 = 431.44 : x
  2. Step 2: Convert to fraction form
    577.60/867.42 = 431.44/x
  3. Step 3: Cross multiply
    577.60x = 867.42 × 431.44
  4. Step 4: Simplify right side
    577.60x = 374,239.68
  5. Step 5: Solve for x
    x = 374,239.68/577.60
  6. Step 6: Final answer
    x = 647.92

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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.