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Finding the Fourth Proportional to 1,306.17, 1,958.72 and 440.01

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Solution

The fourth proportional to 1,306.17, 1,958.72 and 440.01 is: 659.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.17 : 1,958.72 = 440.01 : x
  2. Step 2: Convert to fraction form
    1,306.17/1,958.72 = 440.01/x
  3. Step 3: Cross multiply
    1,306.17x = 1,958.72 × 440.01
  4. Step 4: Simplify right side
    1,306.17x = 861,854.19
  5. Step 5: Solve for x
    x = 861,854.19/1,306.17
  6. Step 6: Final answer
    x = 659.83

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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.