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Finding the Fourth Proportional to 1,301.52, 1,952.80 and 685.06

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Solution

The fourth proportional to 1,301.52, 1,952.80 and 685.06 is: 1,027.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,301.52 : 1,952.80 = 685.06 : x
  2. Step 2: Convert to fraction form
    1,301.52/1,952.80 = 685.06/x
  3. Step 3: Cross multiply
    1,301.52x = 1,952.80 × 685.06
  4. Step 4: Simplify right side
    1,301.52x = 1,337,785.17
  5. Step 5: Solve for x
    x = 1,337,785.17/1,301.52
  6. Step 6: Final answer
    x = 1,027.86

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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.