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Finding the Fourth Proportional to 520.13, 716.79 and 372.51

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Solution

The fourth proportional to 520.13, 716.79 and 372.51 is: 513.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.13 : 716.79 = 372.51 : x
  2. Step 2: Convert to fraction form
    520.13/716.79 = 372.51/x
  3. Step 3: Cross multiply
    520.13x = 716.79 × 372.51
  4. Step 4: Simplify right side
    520.13x = 267,011.44
  5. Step 5: Solve for x
    x = 267,011.44/520.13
  6. Step 6: Final answer
    x = 513.36

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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.