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Finding the Fourth Proportional to 663.66, 993.74 and 560.72

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Solution

The fourth proportional to 663.66, 993.74 and 560.72 is: 839.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.66 : 993.74 = 560.72 : x
  2. Step 2: Convert to fraction form
    663.66/993.74 = 560.72/x
  3. Step 3: Cross multiply
    663.66x = 993.74 × 560.72
  4. Step 4: Simplify right side
    663.66x = 557,209.57
  5. Step 5: Solve for x
    x = 557,209.57/663.66
  6. Step 6: Final answer
    x = 839.60

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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.