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Finding the Fourth Proportional to 397.90, 595.40 and 282.46

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Solution

The fourth proportional to 397.90, 595.40 and 282.46 is: 422.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.90 : 595.40 = 282.46 : x
  2. Step 2: Convert to fraction form
    397.90/595.40 = 282.46/x
  3. Step 3: Cross multiply
    397.90x = 595.40 × 282.46
  4. Step 4: Simplify right side
    397.90x = 168,175.27
  5. Step 5: Solve for x
    x = 168,175.27/397.90
  6. Step 6: Final answer
    x = 422.66

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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.