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Finding the Fourth Proportional to 716.30, 988.67 and 480.91

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Solution

The fourth proportional to 716.30, 988.67 and 480.91 is: 663.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.30 : 988.67 = 480.91 : x
  2. Step 2: Convert to fraction form
    716.30/988.67 = 480.91/x
  3. Step 3: Cross multiply
    716.30x = 988.67 × 480.91
  4. Step 4: Simplify right side
    716.30x = 475,465.58
  5. Step 5: Solve for x
    x = 475,465.58/716.30
  6. Step 6: Final answer
    x = 663.78

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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.