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Finding the Fourth Proportional to 711.22, 1,065.86 and 527.12

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Solution

The fourth proportional to 711.22, 1,065.86 and 527.12 is: 789.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.22 : 1,065.86 = 527.12 : x
  2. Step 2: Convert to fraction form
    711.22/1,065.86 = 527.12/x
  3. Step 3: Cross multiply
    711.22x = 1,065.86 × 527.12
  4. Step 4: Simplify right side
    711.22x = 561,836.12
  5. Step 5: Solve for x
    x = 561,836.12/711.22
  6. Step 6: Final answer
    x = 789.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.