Home / 1,246.46-1,869.68-380.76

Finding the Fourth Proportional to 1,246.46, 1,869.68 and 380.76

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Solution

The fourth proportional to 1,246.46, 1,869.68 and 380.76 is: 571.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.46 : 1,869.68 = 380.76 : x
  2. Step 2: Convert to fraction form
    1,246.46/1,869.68 = 380.76/x
  3. Step 3: Cross multiply
    1,246.46x = 1,869.68 × 380.76
  4. Step 4: Simplify right side
    1,246.46x = 711,899.36
  5. Step 5: Solve for x
    x = 711,899.36/1,246.46
  6. Step 6: Final answer
    x = 571.14

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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.