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Finding the Fourth Proportional to 520.75, 718.64 and 296.71

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Solution

The fourth proportional to 520.75, 718.64 and 296.71 is: 409.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.75 : 718.64 = 296.71 : x
  2. Step 2: Convert to fraction form
    520.75/718.64 = 296.71/x
  3. Step 3: Cross multiply
    520.75x = 718.64 × 296.71
  4. Step 4: Simplify right side
    520.75x = 213,229.55
  5. Step 5: Solve for x
    x = 213,229.55/520.75
  6. Step 6: Final answer
    x = 409.47

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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.