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Finding the Fourth Proportional to 577.98, 867.38 and 424.31

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Solution

The fourth proportional to 577.98, 867.38 and 424.31 is: 636.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.98 : 867.38 = 424.31 : x
  2. Step 2: Convert to fraction form
    577.98/867.38 = 424.31/x
  3. Step 3: Cross multiply
    577.98x = 867.38 × 424.31
  4. Step 4: Simplify right side
    577.98x = 368,031.55
  5. Step 5: Solve for x
    x = 368,031.55/577.98
  6. Step 6: Final answer
    x = 636.75

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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.