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Finding the Fourth Proportional to 1,472.13, 2,207.60 and 649.82

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Solution

The fourth proportional to 1,472.13, 2,207.60 and 649.82 is: 974.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,472.13 : 2,207.60 = 649.82 : x
  2. Step 2: Convert to fraction form
    1,472.13/2,207.60 = 649.82/x
  3. Step 3: Cross multiply
    1,472.13x = 2,207.60 × 649.82
  4. Step 4: Simplify right side
    1,472.13x = 1,434,531.59
  5. Step 5: Solve for x
    x = 1,434,531.59/1,472.13
  6. Step 6: Final answer
    x = 974.46

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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.