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Finding the Fourth Proportional to 994.74, 1,373.36 and 680.52

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Solution

The fourth proportional to 994.74, 1,373.36 and 680.52 is: 939.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.74 : 1,373.36 = 680.52 : x
  2. Step 2: Convert to fraction form
    994.74/1,373.36 = 680.52/x
  3. Step 3: Cross multiply
    994.74x = 1,373.36 × 680.52
  4. Step 4: Simplify right side
    994.74x = 934,598.95
  5. Step 5: Solve for x
    x = 934,598.95/994.74
  6. Step 6: Final answer
    x = 939.54

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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.