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Finding the Fourth Proportional to 520.57, 718.40 and 296.54

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Solution

The fourth proportional to 520.57, 718.40 and 296.54 is: 409.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.57 : 718.40 = 296.54 : x
  2. Step 2: Convert to fraction form
    520.57/718.40 = 296.54/x
  3. Step 3: Cross multiply
    520.57x = 718.40 × 296.54
  4. Step 4: Simplify right side
    520.57x = 213,034.34
  5. Step 5: Solve for x
    x = 213,034.34/520.57
  6. Step 6: Final answer
    x = 409.23

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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.