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Finding the Fourth Proportional to 574.64, 861.53 and 286.28

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Solution

The fourth proportional to 574.64, 861.53 and 286.28 is: 429.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.64 : 861.53 = 286.28 : x
  2. Step 2: Convert to fraction form
    574.64/861.53 = 286.28/x
  3. Step 3: Cross multiply
    574.64x = 861.53 × 286.28
  4. Step 4: Simplify right side
    574.64x = 246,639.52
  5. Step 5: Solve for x
    x = 246,639.52/574.64
  6. Step 6: Final answer
    x = 429.21

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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.