Home / 1,455.10-2,181.13-725.09

Finding the Fourth Proportional to 1,455.10, 2,181.13 and 725.09

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Solution

The fourth proportional to 1,455.10, 2,181.13 and 725.09 is: 1,086.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.10 : 2,181.13 = 725.09 : x
  2. Step 2: Convert to fraction form
    1,455.10/2,181.13 = 725.09/x
  3. Step 3: Cross multiply
    1,455.10x = 2,181.13 × 725.09
  4. Step 4: Simplify right side
    1,455.10x = 1,581,502.83
  5. Step 5: Solve for x
    x = 1,581,502.83/1,455.10
  6. Step 6: Final answer
    x = 1,086.87

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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.