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Finding the Fourth Proportional to 521.67, 720.86 and 496.37

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Solution

The fourth proportional to 521.67, 720.86 and 496.37 is: 685.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.67 : 720.86 = 496.37 : x
  2. Step 2: Convert to fraction form
    521.67/720.86 = 496.37/x
  3. Step 3: Cross multiply
    521.67x = 720.86 × 496.37
  4. Step 4: Simplify right side
    521.67x = 357,807.19
  5. Step 5: Solve for x
    x = 357,807.19/521.67
  6. Step 6: Final answer
    x = 685.89

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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.