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Finding the Fourth Proportional to 1,917.19, 2,879.88 and 1,372.87

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Solution

The fourth proportional to 1,917.19, 2,879.88 and 1,372.87 is: 2,062.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.19 : 2,879.88 = 1,372.87 : x
  2. Step 2: Convert to fraction form
    1,917.19/2,879.88 = 1,372.87/x
  3. Step 3: Cross multiply
    1,917.19x = 2,879.88 × 1,372.87
  4. Step 4: Simplify right side
    1,917.19x = 3,953,700.86
  5. Step 5: Solve for x
    x = 3,953,700.86/1,917.19
  6. Step 6: Final answer
    x = 2,062.24

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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.