Home / 1,438.39-2,147.84-1,142.57

Finding the Fourth Proportional to 1,438.39, 2,147.84 and 1,142.57

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Solution

The fourth proportional to 1,438.39, 2,147.84 and 1,142.57 is: 1,706.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.39 : 2,147.84 = 1,142.57 : x
  2. Step 2: Convert to fraction form
    1,438.39/2,147.84 = 1,142.57/x
  3. Step 3: Cross multiply
    1,438.39x = 2,147.84 × 1,142.57
  4. Step 4: Simplify right side
    1,438.39x = 2,454,057.55
  5. Step 5: Solve for x
    x = 2,454,057.55/1,438.39
  6. Step 6: Final answer
    x = 1,706.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.