Home / 3,319.20-4,977.45-1,126.80

Finding the Fourth Proportional to 3,319.20, 4,977.45 and 1,126.80

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Solution

The fourth proportional to 3,319.20, 4,977.45 and 1,126.80 is: 1,689.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,319.20 : 4,977.45 = 1,126.80 : x
  2. Step 2: Convert to fraction form
    3,319.20/4,977.45 = 1,126.80/x
  3. Step 3: Cross multiply
    3,319.20x = 4,977.45 × 1,126.80
  4. Step 4: Simplify right side
    3,319.20x = 5,608,590.66
  5. Step 5: Solve for x
    x = 5,608,590.66/3,319.20
  6. Step 6: Final answer
    x = 1,689.74

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1.5x scale

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.