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Finding the Fourth Proportional to 1,879.90, 2,596.90 and 1,358.66

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Solution

The fourth proportional to 1,879.90, 2,596.90 and 1,358.66 is: 1,876.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,879.90 : 2,596.90 = 1,358.66 : x
  2. Step 2: Convert to fraction form
    1,879.90/2,596.90 = 1,358.66/x
  3. Step 3: Cross multiply
    1,879.90x = 2,596.90 × 1,358.66
  4. Step 4: Simplify right side
    1,879.90x = 3,528,304.15
  5. Step 5: Solve for x
    x = 3,528,304.15/1,879.90
  6. Step 6: Final answer
    x = 1,876.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.