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Finding the Fourth Proportional to 716.32, 988.86 and 559.18

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Solution

The fourth proportional to 716.32, 988.86 and 559.18 is: 771.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.32 : 988.86 = 559.18 : x
  2. Step 2: Convert to fraction form
    716.32/988.86 = 559.18/x
  3. Step 3: Cross multiply
    716.32x = 988.86 × 559.18
  4. Step 4: Simplify right side
    716.32x = 552,950.73
  5. Step 5: Solve for x
    x = 552,950.73/716.32
  6. Step 6: Final answer
    x = 771.93

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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.