Home / 1,438.38-2,156.67-616.20

Finding the Fourth Proportional to 1,438.38, 2,156.67 and 616.20

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Solution

The fourth proportional to 1,438.38, 2,156.67 and 616.20 is: 923.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.38 : 2,156.67 = 616.20 : x
  2. Step 2: Convert to fraction form
    1,438.38/2,156.67 = 616.20/x
  3. Step 3: Cross multiply
    1,438.38x = 2,156.67 × 616.20
  4. Step 4: Simplify right side
    1,438.38x = 1,328,940.05
  5. Step 5: Solve for x
    x = 1,328,940.05/1,438.38
  6. Step 6: Final answer
    x = 923.91

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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.