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Finding the Fourth Proportional to 520.76, 718.17 and 396.83

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Solution

The fourth proportional to 520.76, 718.17 and 396.83 is: 547.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.76 : 718.17 = 396.83 : x
  2. Step 2: Convert to fraction form
    520.76/718.17 = 396.83/x
  3. Step 3: Cross multiply
    520.76x = 718.17 × 396.83
  4. Step 4: Simplify right side
    520.76x = 284,991.71
  5. Step 5: Solve for x
    x = 284,991.71/520.76
  6. Step 6: Final answer
    x = 547.26

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Find fourth proportional to 260.38, 359.08 and 198.42
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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.