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Finding the Fourth Proportional to 994.19, 1,371.87 and 574.47

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Solution

The fourth proportional to 994.19, 1,371.87 and 574.47 is: 792.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.19 : 1,371.87 = 574.47 : x
  2. Step 2: Convert to fraction form
    994.19/1,371.87 = 574.47/x
  3. Step 3: Cross multiply
    994.19x = 1,371.87 × 574.47
  4. Step 4: Simplify right side
    994.19x = 788,098.16
  5. Step 5: Solve for x
    x = 788,098.16/994.19
  6. Step 6: Final answer
    x = 792.71

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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.