Home / 1,438.27-2,155.60-615.57

Finding the Fourth Proportional to 1,438.27, 2,155.60 and 615.57

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Solution

The fourth proportional to 1,438.27, 2,155.60 and 615.57 is: 922.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.27 : 2,155.60 = 615.57 : x
  2. Step 2: Convert to fraction form
    1,438.27/2,155.60 = 615.57/x
  3. Step 3: Cross multiply
    1,438.27x = 2,155.60 × 615.57
  4. Step 4: Simplify right side
    1,438.27x = 1,326,919.61
  5. Step 5: Solve for x
    x = 1,326,919.61/1,438.27
  6. Step 6: Final answer
    x = 922.58

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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.