Home / 2,379.76-3,284.16-1,385.28

Finding the Fourth Proportional to 2,379.76, 3,284.16 and 1,385.28

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Solution

The fourth proportional to 2,379.76, 3,284.16 and 1,385.28 is: 1,911.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.76 : 3,284.16 = 1,385.28 : x
  2. Step 2: Convert to fraction form
    2,379.76/3,284.16 = 1,385.28/x
  3. Step 3: Cross multiply
    2,379.76x = 3,284.16 × 1,385.28
  4. Step 4: Simplify right side
    2,379.76x = 4,549,481.16
  5. Step 5: Solve for x
    x = 4,549,481.16/2,379.76
  6. Step 6: Final answer
    x = 1,911.74

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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.