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Finding the Fourth Proportional to 424.88, 587.31 and 354.53

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Solution

The fourth proportional to 424.88, 587.31 and 354.53 is: 490.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.88 : 587.31 = 354.53 : x
  2. Step 2: Convert to fraction form
    424.88/587.31 = 354.53/x
  3. Step 3: Cross multiply
    424.88x = 587.31 × 354.53
  4. Step 4: Simplify right side
    424.88x = 208,216.08
  5. Step 5: Solve for x
    x = 208,216.08/424.88
  6. Step 6: Final answer
    x = 490.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.