Home / 3,178.10-4,385.66-1,851.90

Finding the Fourth Proportional to 3,178.10, 4,385.66 and 1,851.90

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Solution

The fourth proportional to 3,178.10, 4,385.66 and 1,851.90 is: 2,555.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.10 : 4,385.66 = 1,851.90 : x
  2. Step 2: Convert to fraction form
    3,178.10/4,385.66 = 1,851.90/x
  3. Step 3: Cross multiply
    3,178.10x = 4,385.66 × 1,851.90
  4. Step 4: Simplify right side
    3,178.10x = 8,121,803.75
  5. Step 5: Solve for x
    x = 8,121,803.75/3,178.10
  6. Step 6: Final answer
    x = 2,555.55

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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.