Home / 1,817.20-2,507.45-1,031.10

Finding the Fourth Proportional to 1,817.20, 2,507.45 and 1,031.10

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Solution

The fourth proportional to 1,817.20, 2,507.45 and 1,031.10 is: 1,422.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,817.20 : 2,507.45 = 1,031.10 : x
  2. Step 2: Convert to fraction form
    1,817.20/2,507.45 = 1,031.10/x
  3. Step 3: Cross multiply
    1,817.20x = 2,507.45 × 1,031.10
  4. Step 4: Simplify right side
    1,817.20x = 2,585,431.70
  5. Step 5: Solve for x
    x = 2,585,431.70/1,817.20
  6. Step 6: Final answer
    x = 1,422.76

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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.