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Finding the Fourth Proportional to 913.39, 1,260.48 and 520.41

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Solution

The fourth proportional to 913.39, 1,260.48 and 520.41 is: 718.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.39 : 1,260.48 = 520.41 : x
  2. Step 2: Convert to fraction form
    913.39/1,260.48 = 520.41/x
  3. Step 3: Cross multiply
    913.39x = 1,260.48 × 520.41
  4. Step 4: Simplify right side
    913.39x = 655,966.40
  5. Step 5: Solve for x
    x = 655,966.40/913.39
  6. Step 6: Final answer
    x = 718.17

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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.