Home / 1,021.19-1,531.38-371.57

Finding the Fourth Proportional to 1,021.19, 1,531.38 and 371.57

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Solution

The fourth proportional to 1,021.19, 1,531.38 and 371.57 is: 557.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.19 : 1,531.38 = 371.57 : x
  2. Step 2: Convert to fraction form
    1,021.19/1,531.38 = 371.57/x
  3. Step 3: Cross multiply
    1,021.19x = 1,531.38 × 371.57
  4. Step 4: Simplify right side
    1,021.19x = 569,014.87
  5. Step 5: Solve for x
    x = 569,014.87/1,021.19
  6. Step 6: Final answer
    x = 557.21

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Double scale
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1.5x scale

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.