Home / 1,246.28-1,868.87-380.39

Finding the Fourth Proportional to 1,246.28, 1,868.87 and 380.39

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Solution

The fourth proportional to 1,246.28, 1,868.87 and 380.39 is: 570.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.28 : 1,868.87 = 380.39 : x
  2. Step 2: Convert to fraction form
    1,246.28/1,868.87 = 380.39/x
  3. Step 3: Cross multiply
    1,246.28x = 1,868.87 × 380.39
  4. Step 4: Simplify right side
    1,246.28x = 710,888.21
  5. Step 5: Solve for x
    x = 710,888.21/1,246.28
  6. Step 6: Final answer
    x = 570.41

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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.