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Finding the Fourth Proportional to 994.66, 1,373.22 and 663.56

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Solution

The fourth proportional to 994.66, 1,373.22 and 663.56 is: 916.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.66 : 1,373.22 = 663.56 : x
  2. Step 2: Convert to fraction form
    994.66/1,373.22 = 663.56/x
  3. Step 3: Cross multiply
    994.66x = 1,373.22 × 663.56
  4. Step 4: Simplify right side
    994.66x = 911,213.86
  5. Step 5: Solve for x
    x = 911,213.86/994.66
  6. Step 6: Final answer
    x = 916.11

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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.