Home / 1,917.25-2,876.17-618.85

Finding the Fourth Proportional to 1,917.25, 2,876.17 and 618.85

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Solution

The fourth proportional to 1,917.25, 2,876.17 and 618.85 is: 928.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.25 : 2,876.17 = 618.85 : x
  2. Step 2: Convert to fraction form
    1,917.25/2,876.17 = 618.85/x
  3. Step 3: Cross multiply
    1,917.25x = 2,876.17 × 618.85
  4. Step 4: Simplify right side
    1,917.25x = 1,779,900.33
  5. Step 5: Solve for x
    x = 1,779,900.33/1,917.25
  6. Step 6: Final answer
    x = 928.36

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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.