Home / 1,021.35-1,531.10-371.63

Finding the Fourth Proportional to 1,021.35, 1,531.10 and 371.63

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Solution

The fourth proportional to 1,021.35, 1,531.10 and 371.63 is: 557.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.35 : 1,531.10 = 371.63 : x
  2. Step 2: Convert to fraction form
    1,021.35/1,531.10 = 371.63/x
  3. Step 3: Cross multiply
    1,021.35x = 1,531.10 × 371.63
  4. Step 4: Simplify right side
    1,021.35x = 568,993.18
  5. Step 5: Solve for x
    x = 568,993.18/1,021.35
  6. Step 6: Final answer
    x = 557.10

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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.