Home / 1,410.20-2,115.30-754.10

Finding the Fourth Proportional to 1,410.20, 2,115.30 and 754.10

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Solution

The fourth proportional to 1,410.20, 2,115.30 and 754.10 is: 1,131.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,410.20 : 2,115.30 = 754.10 : x
  2. Step 2: Convert to fraction form
    1,410.20/2,115.30 = 754.10/x
  3. Step 3: Cross multiply
    1,410.20x = 2,115.30 × 754.10
  4. Step 4: Simplify right side
    1,410.20x = 1,595,147.73
  5. Step 5: Solve for x
    x = 1,595,147.73/1,410.20
  6. Step 6: Final answer
    x = 1,131.15

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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.