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Finding the Fourth Proportional to 521.58, 720.21 and 496.97

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Solution

The fourth proportional to 521.58, 720.21 and 496.97 is: 686.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.58 : 720.21 = 496.97 : x
  2. Step 2: Convert to fraction form
    521.58/720.21 = 496.97/x
  3. Step 3: Cross multiply
    521.58x = 720.21 × 496.97
  4. Step 4: Simplify right side
    521.58x = 357,922.76
  5. Step 5: Solve for x
    x = 357,922.76/521.58
  6. Step 6: Final answer
    x = 686.23

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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.