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Finding the Fourth Proportional to 285.28, 424.52 and 274.34

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Solution

The fourth proportional to 285.28, 424.52 and 274.34 is: 408.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.28 : 424.52 = 274.34 : x
  2. Step 2: Convert to fraction form
    285.28/424.52 = 274.34/x
  3. Step 3: Cross multiply
    285.28x = 424.52 × 274.34
  4. Step 4: Simplify right side
    285.28x = 116,462.82
  5. Step 5: Solve for x
    x = 116,462.82/285.28
  6. Step 6: Final answer
    x = 408.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.