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Finding the Fourth Proportional to 2,155.90, 3,233.76 and 616.90

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Solution

The fourth proportional to 2,155.90, 3,233.76 and 616.90 is: 925.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.90 : 3,233.76 = 616.90 : x
  2. Step 2: Convert to fraction form
    2,155.90/3,233.76 = 616.90/x
  3. Step 3: Cross multiply
    2,155.90x = 3,233.76 × 616.90
  4. Step 4: Simplify right side
    2,155.90x = 1,994,916.17
  5. Step 5: Solve for x
    x = 1,994,916.17/2,155.90
  6. Step 6: Final answer
    x = 925.33

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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.