Home / 3,145.32-4,713.84-1,389.72

Finding the Fourth Proportional to 3,145.32, 4,713.84 and 1,389.72

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Solution

The fourth proportional to 3,145.32, 4,713.84 and 1,389.72 is: 2,082.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.32 : 4,713.84 = 1,389.72 : x
  2. Step 2: Convert to fraction form
    3,145.32/4,713.84 = 1,389.72/x
  3. Step 3: Cross multiply
    3,145.32x = 4,713.84 × 1,389.72
  4. Step 4: Simplify right side
    3,145.32x = 6,550,917.72
  5. Step 5: Solve for x
    x = 6,550,917.72/3,145.32
  6. Step 6: Final answer
    x = 2,082.75

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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.