Home / 3,145.11-4,340.19-1,728.72

Finding the Fourth Proportional to 3,145.11, 4,340.19 and 1,728.72

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Solution

The fourth proportional to 3,145.11, 4,340.19 and 1,728.72 is: 2,385.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.11 : 4,340.19 = 1,728.72 : x
  2. Step 2: Convert to fraction form
    3,145.11/4,340.19 = 1,728.72/x
  3. Step 3: Cross multiply
    3,145.11x = 4,340.19 × 1,728.72
  4. Step 4: Simplify right side
    3,145.11x = 7,502,973.26
  5. Step 5: Solve for x
    x = 7,502,973.26/3,145.11
  6. Step 6: Final answer
    x = 2,385.60

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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.