Home / 1,315.08-1,972.86-449.18

Finding the Fourth Proportional to 1,315.08, 1,972.86 and 449.18

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Solution

The fourth proportional to 1,315.08, 1,972.86 and 449.18 is: 673.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.08 : 1,972.86 = 449.18 : x
  2. Step 2: Convert to fraction form
    1,315.08/1,972.86 = 449.18/x
  3. Step 3: Cross multiply
    1,315.08x = 1,972.86 × 449.18
  4. Step 4: Simplify right side
    1,315.08x = 886,169.25
  5. Step 5: Solve for x
    x = 886,169.25/1,315.08
  6. Step 6: Final answer
    x = 673.85

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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.