Home / 1,021.17-1,531.79-371.91

Finding the Fourth Proportional to 1,021.17, 1,531.79 and 371.91

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Solution

The fourth proportional to 1,021.17, 1,531.79 and 371.91 is: 557.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.17 : 1,531.79 = 371.91 : x
  2. Step 2: Convert to fraction form
    1,021.17/1,531.79 = 371.91/x
  3. Step 3: Cross multiply
    1,021.17x = 1,531.79 × 371.91
  4. Step 4: Simplify right side
    1,021.17x = 569,686.16
  5. Step 5: Solve for x
    x = 569,686.16/1,021.17
  6. Step 6: Final answer
    x = 557.88

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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.