Home / 2,957.12-4,080.24-1,778.72

Finding the Fourth Proportional to 2,957.12, 4,080.24 and 1,778.72

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Solution

The fourth proportional to 2,957.12, 4,080.24 and 1,778.72 is: 2,454.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,957.12 : 4,080.24 = 1,778.72 : x
  2. Step 2: Convert to fraction form
    2,957.12/4,080.24 = 1,778.72/x
  3. Step 3: Cross multiply
    2,957.12x = 4,080.24 × 1,778.72
  4. Step 4: Simplify right side
    2,957.12x = 7,257,604.49
  5. Step 5: Solve for x
    x = 7,257,604.49/2,957.12
  6. Step 6: Final answer
    x = 2,454.28

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1.5x scale

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.