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Finding the Fourth Proportional to 415.56, 573.66 and 285.24

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Solution

The fourth proportional to 415.56, 573.66 and 285.24 is: 393.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.56 : 573.66 = 285.24 : x
  2. Step 2: Convert to fraction form
    415.56/573.66 = 285.24/x
  3. Step 3: Cross multiply
    415.56x = 573.66 × 285.24
  4. Step 4: Simplify right side
    415.56x = 163,630.78
  5. Step 5: Solve for x
    x = 163,630.78/415.56
  6. Step 6: Final answer
    x = 393.76

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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.