Home / 1,379.12-2,059.76-1,248.86

Finding the Fourth Proportional to 1,379.12, 2,059.76 and 1,248.86

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Solution

The fourth proportional to 1,379.12, 2,059.76 and 1,248.86 is: 1,865.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.12 : 2,059.76 = 1,248.86 : x
  2. Step 2: Convert to fraction form
    1,379.12/2,059.76 = 1,248.86/x
  3. Step 3: Cross multiply
    1,379.12x = 2,059.76 × 1,248.86
  4. Step 4: Simplify right side
    1,379.12x = 2,572,351.87
  5. Step 5: Solve for x
    x = 2,572,351.87/1,379.12
  6. Step 6: Final answer
    x = 1,865.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.