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Finding the Fourth Proportional to 700.61, 1,046.22 and 660.11

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Solution

The fourth proportional to 700.61, 1,046.22 and 660.11 is: 985.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.61 : 1,046.22 = 660.11 : x
  2. Step 2: Convert to fraction form
    700.61/1,046.22 = 660.11/x
  3. Step 3: Cross multiply
    700.61x = 1,046.22 × 660.11
  4. Step 4: Simplify right side
    700.61x = 690,615.05
  5. Step 5: Solve for x
    x = 690,615.05/700.61
  6. Step 6: Final answer
    x = 985.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.