Home / 1,330.38-1,989-1,127.22

Finding the Fourth Proportional to 1,330.38, 1,989 and 1,127.22

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Solution

The fourth proportional to 1,330.38, 1,989 and 1,127.22 is: 1,685.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.38 : 1,989 = 1,127.22 : x
  2. Step 2: Convert to fraction form
    1,330.38/1,989 = 1,127.22/x
  3. Step 3: Cross multiply
    1,330.38x = 1,989 × 1,127.22
  4. Step 4: Simplify right side
    1,330.38x = 2,242,040.58
  5. Step 5: Solve for x
    x = 2,242,040.58/1,330.38
  6. Step 6: Final answer
    x = 1,685.26

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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.