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Finding the Fourth Proportional to 574.65, 861.57 and 355.28

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Solution

The fourth proportional to 574.65, 861.57 and 355.28 is: 532.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.65 : 861.57 = 355.28 : x
  2. Step 2: Convert to fraction form
    574.65/861.57 = 355.28/x
  3. Step 3: Cross multiply
    574.65x = 861.57 × 355.28
  4. Step 4: Simplify right side
    574.65x = 306,094.28
  5. Step 5: Solve for x
    x = 306,094.28/574.65
  6. Step 6: Final answer
    x = 532.66

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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.