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Finding the Fourth Proportional to 741.62, 1,022.95 and 520.18

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Solution

The fourth proportional to 741.62, 1,022.95 and 520.18 is: 717.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.62 : 1,022.95 = 520.18 : x
  2. Step 2: Convert to fraction form
    741.62/1,022.95 = 520.18/x
  3. Step 3: Cross multiply
    741.62x = 1,022.95 × 520.18
  4. Step 4: Simplify right side
    741.62x = 532,118.13
  5. Step 5: Solve for x
    x = 532,118.13/741.62
  6. Step 6: Final answer
    x = 717.51

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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.