Home / 3,145.10-4,717.65-1,687.10

Finding the Fourth Proportional to 3,145.10, 4,717.65 and 1,687.10

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Solution

The fourth proportional to 3,145.10, 4,717.65 and 1,687.10 is: 2,530.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.10 : 4,717.65 = 1,687.10 : x
  2. Step 2: Convert to fraction form
    3,145.10/4,717.65 = 1,687.10/x
  3. Step 3: Cross multiply
    3,145.10x = 4,717.65 × 1,687.10
  4. Step 4: Simplify right side
    3,145.10x = 7,959,147.32
  5. Step 5: Solve for x
    x = 7,959,147.32/3,145.10
  6. Step 6: Final answer
    x = 2,530.65

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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.