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Finding the Fourth Proportional to 2,155.40, 3,233.09 and 616.40

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Solution

The fourth proportional to 2,155.40, 3,233.09 and 616.40 is: 924.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.40 : 3,233.09 = 616.40 : x
  2. Step 2: Convert to fraction form
    2,155.40/3,233.09 = 616.40/x
  3. Step 3: Cross multiply
    2,155.40x = 3,233.09 × 616.40
  4. Step 4: Simplify right side
    2,155.40x = 1,992,862.05
  5. Step 5: Solve for x
    x = 1,992,862.05/2,155.40
  6. Step 6: Final answer
    x = 924.59

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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.