Home / 1,246.40-1,869.76-380.60

Finding the Fourth Proportional to 1,246.40, 1,869.76 and 380.60

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Solution

The fourth proportional to 1,246.40, 1,869.76 and 380.60 is: 570.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.40 : 1,869.76 = 380.60 : x
  2. Step 2: Convert to fraction form
    1,246.40/1,869.76 = 380.60/x
  3. Step 3: Cross multiply
    1,246.40x = 1,869.76 × 380.60
  4. Step 4: Simplify right side
    1,246.40x = 711,630.66
  5. Step 5: Solve for x
    x = 711,630.66/1,246.40
  6. Step 6: Final answer
    x = 570.95

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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.