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Finding the Fourth Proportional to 575.16, 861.49 and 488.28

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Solution

The fourth proportional to 575.16, 861.49 and 488.28 is: 731.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.16 : 861.49 = 488.28 : x
  2. Step 2: Convert to fraction form
    575.16/861.49 = 488.28/x
  3. Step 3: Cross multiply
    575.16x = 861.49 × 488.28
  4. Step 4: Simplify right side
    575.16x = 420,648.34
  5. Step 5: Solve for x
    x = 420,648.34/575.16
  6. Step 6: Final answer
    x = 731.36

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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.