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Finding the Fourth Proportional to 761.01, 1,142.19 and 371.31

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Solution

The fourth proportional to 761.01, 1,142.19 and 371.31 is: 557.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.01 : 1,142.19 = 371.31 : x
  2. Step 2: Convert to fraction form
    761.01/1,142.19 = 371.31/x
  3. Step 3: Cross multiply
    761.01x = 1,142.19 × 371.31
  4. Step 4: Simplify right side
    761.01x = 424,106.57
  5. Step 5: Solve for x
    x = 424,106.57/761.01
  6. Step 6: Final answer
    x = 557.29

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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.