Home / 1,442.16-1,990.44-1,131.12

Finding the Fourth Proportional to 1,442.16, 1,990.44 and 1,131.12

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Solution

The fourth proportional to 1,442.16, 1,990.44 and 1,131.12 is: 1,561.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.16 : 1,990.44 = 1,131.12 : x
  2. Step 2: Convert to fraction form
    1,442.16/1,990.44 = 1,131.12/x
  3. Step 3: Cross multiply
    1,442.16x = 1,990.44 × 1,131.12
  4. Step 4: Simplify right side
    1,442.16x = 2,251,426.49
  5. Step 5: Solve for x
    x = 2,251,426.49/1,442.16
  6. Step 6: Final answer
    x = 1,561.15

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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.