Home / 1,020.61-1,531.10-371.39

Finding the Fourth Proportional to 1,020.61, 1,531.10 and 371.39

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Solution

The fourth proportional to 1,020.61, 1,531.10 and 371.39 is: 557.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.61 : 1,531.10 = 371.39 : x
  2. Step 2: Convert to fraction form
    1,020.61/1,531.10 = 371.39/x
  3. Step 3: Cross multiply
    1,020.61x = 1,531.10 × 371.39
  4. Step 4: Simplify right side
    1,020.61x = 568,635.23
  5. Step 5: Solve for x
    x = 568,635.23/1,020.61
  6. Step 6: Final answer
    x = 557.15

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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.