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Finding the Fourth Proportional to 913.35, 1,260.18 and 520.37

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Solution

The fourth proportional to 913.35, 1,260.18 and 520.37 is: 717.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.35 : 1,260.18 = 520.37 : x
  2. Step 2: Convert to fraction form
    913.35/1,260.18 = 520.37/x
  3. Step 3: Cross multiply
    913.35x = 1,260.18 × 520.37
  4. Step 4: Simplify right side
    913.35x = 655,753.57
  5. Step 5: Solve for x
    x = 655,753.57/913.35
  6. Step 6: Final answer
    x = 717.97

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1.5x scale

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.