Home / 1,151.40-1,727.15-318.55

Finding the Fourth Proportional to 1,151.40, 1,727.15 and 318.55

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Solution

The fourth proportional to 1,151.40, 1,727.15 and 318.55 is: 477.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.40 : 1,727.15 = 318.55 : x
  2. Step 2: Convert to fraction form
    1,151.40/1,727.15 = 318.55/x
  3. Step 3: Cross multiply
    1,151.40x = 1,727.15 × 318.55
  4. Step 4: Simplify right side
    1,151.40x = 550,184.20
  5. Step 5: Solve for x
    x = 550,184.20/1,151.40
  6. Step 6: Final answer
    x = 477.84

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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.