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Finding the Fourth Proportional to 913.27, 1,260.33 and 520.39

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Solution

The fourth proportional to 913.27, 1,260.33 and 520.39 is: 718.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.27 : 1,260.33 = 520.39 : x
  2. Step 2: Convert to fraction form
    913.27/1,260.33 = 520.39/x
  3. Step 3: Cross multiply
    913.27x = 1,260.33 × 520.39
  4. Step 4: Simplify right side
    913.27x = 655,863.13
  5. Step 5: Solve for x
    x = 655,863.13/913.27
  6. Step 6: Final answer
    x = 718.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.