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Finding the Fourth Proportional to 1,332.01, 1,998.11 and 971.15

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Solution

The fourth proportional to 1,332.01, 1,998.11 and 971.15 is: 1,456.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.01 : 1,998.11 = 971.15 : x
  2. Step 2: Convert to fraction form
    1,332.01/1,998.11 = 971.15/x
  3. Step 3: Cross multiply
    1,332.01x = 1,998.11 × 971.15
  4. Step 4: Simplify right side
    1,332.01x = 1,940,471.95
  5. Step 5: Solve for x
    x = 1,940,471.95/1,332.01
  6. Step 6: Final answer
    x = 1,456.80

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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.