Home / 1,246.55-1,869.80-380.85

Finding the Fourth Proportional to 1,246.55, 1,869.80 and 380.85

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Solution

The fourth proportional to 1,246.55, 1,869.80 and 380.85 is: 571.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.55 : 1,869.80 = 380.85 : x
  2. Step 2: Convert to fraction form
    1,246.55/1,869.80 = 380.85/x
  3. Step 3: Cross multiply
    1,246.55x = 1,869.80 × 380.85
  4. Step 4: Simplify right side
    1,246.55x = 712,111.43
  5. Step 5: Solve for x
    x = 712,111.43/1,246.55
  6. Step 6: Final answer
    x = 571.27

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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.