Home / 1,131.18-1,560.29-816.92

Finding the Fourth Proportional to 1,131.18, 1,560.29 and 816.92

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Solution

The fourth proportional to 1,131.18, 1,560.29 and 816.92 is: 1,126.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.18 : 1,560.29 = 816.92 : x
  2. Step 2: Convert to fraction form
    1,131.18/1,560.29 = 816.92/x
  3. Step 3: Cross multiply
    1,131.18x = 1,560.29 × 816.92
  4. Step 4: Simplify right side
    1,131.18x = 1,274,632.11
  5. Step 5: Solve for x
    x = 1,274,632.11/1,131.18
  6. Step 6: Final answer
    x = 1,126.82

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Double scale
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1.5x scale

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.