Home / 1,422.38-2,135.60-1,117.55

Finding the Fourth Proportional to 1,422.38, 2,135.60 and 1,117.55

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Solution

The fourth proportional to 1,422.38, 2,135.60 and 1,117.55 is: 1,677.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.38 : 2,135.60 = 1,117.55 : x
  2. Step 2: Convert to fraction form
    1,422.38/2,135.60 = 1,117.55/x
  3. Step 3: Cross multiply
    1,422.38x = 2,135.60 × 1,117.55
  4. Step 4: Simplify right side
    1,422.38x = 2,386,623.51
  5. Step 5: Solve for x
    x = 2,386,623.51/1,422.38
  6. Step 6: Final answer
    x = 1,677.91

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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.