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Finding the Fourth Proportional to 959.47, 1,436.40 and 729.26

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Solution

The fourth proportional to 959.47, 1,436.40 and 729.26 is: 1,091.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.47 : 1,436.40 = 729.26 : x
  2. Step 2: Convert to fraction form
    959.47/1,436.40 = 729.26/x
  3. Step 3: Cross multiply
    959.47x = 1,436.40 × 729.26
  4. Step 4: Simplify right side
    959.47x = 1,047,507.27
  5. Step 5: Solve for x
    x = 1,047,507.27/959.47
  6. Step 6: Final answer
    x = 1,091.76

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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.