Home / 1,515.28-2,092.28-1,316.80

Finding the Fourth Proportional to 1,515.28, 2,092.28 and 1,316.80

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Solution

The fourth proportional to 1,515.28, 2,092.28 and 1,316.80 is: 1,818.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.28 : 2,092.28 = 1,316.80 : x
  2. Step 2: Convert to fraction form
    1,515.28/2,092.28 = 1,316.80/x
  3. Step 3: Cross multiply
    1,515.28x = 2,092.28 × 1,316.80
  4. Step 4: Simplify right side
    1,515.28x = 2,755,114.30
  5. Step 5: Solve for x
    x = 2,755,114.30/1,515.28
  6. Step 6: Final answer
    x = 1,818.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.