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Finding the Fourth Proportional to 913.52, 1,260.64 and 520.48

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Solution

The fourth proportional to 913.52, 1,260.64 and 520.48 is: 718.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.52 : 1,260.64 = 520.48 : x
  2. Step 2: Convert to fraction form
    913.52/1,260.64 = 520.48/x
  3. Step 3: Cross multiply
    913.52x = 1,260.64 × 520.48
  4. Step 4: Simplify right side
    913.52x = 656,137.91
  5. Step 5: Solve for x
    x = 656,137.91/913.52
  6. Step 6: Final answer
    x = 718.25

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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.