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Finding the Fourth Proportional to 994.19, 1,371.95 and 552.09

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Solution

The fourth proportional to 994.19, 1,371.95 and 552.09 is: 761.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.19 : 1,371.95 = 552.09 : x
  2. Step 2: Convert to fraction form
    994.19/1,371.95 = 552.09/x
  3. Step 3: Cross multiply
    994.19x = 1,371.95 × 552.09
  4. Step 4: Simplify right side
    994.19x = 757,437.12
  5. Step 5: Solve for x
    x = 757,437.12/994.19
  6. Step 6: Final answer
    x = 761.86

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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.