Home / 3,145.72-4,718.85-1,065.78

Finding the Fourth Proportional to 3,145.72, 4,718.85 and 1,065.78

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Solution

The fourth proportional to 3,145.72, 4,718.85 and 1,065.78 is: 1,598.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.72 : 4,718.85 = 1,065.78 : x
  2. Step 2: Convert to fraction form
    3,145.72/4,718.85 = 1,065.78/x
  3. Step 3: Cross multiply
    3,145.72x = 4,718.85 × 1,065.78
  4. Step 4: Simplify right side
    3,145.72x = 5,029,255.95
  5. Step 5: Solve for x
    x = 5,029,255.95/3,145.72
  6. Step 6: Final answer
    x = 1,598.76

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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.