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Finding the Fourth Proportional to 971.11, 1,456.60 and 393.97

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Solution

The fourth proportional to 971.11, 1,456.60 and 393.97 is: 590.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.11 : 1,456.60 = 393.97 : x
  2. Step 2: Convert to fraction form
    971.11/1,456.60 = 393.97/x
  3. Step 3: Cross multiply
    971.11x = 1,456.60 × 393.97
  4. Step 4: Simplify right side
    971.11x = 573,853.55
  5. Step 5: Solve for x
    x = 573,853.55/971.11
  6. Step 6: Final answer
    x = 590.93

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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.