Home / 1,378.29-2,067.52-454.15

Finding the Fourth Proportional to 1,378.29, 2,067.52 and 454.15

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Solution

The fourth proportional to 1,378.29, 2,067.52 and 454.15 is: 681.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.29 : 2,067.52 = 454.15 : x
  2. Step 2: Convert to fraction form
    1,378.29/2,067.52 = 454.15/x
  3. Step 3: Cross multiply
    1,378.29x = 2,067.52 × 454.15
  4. Step 4: Simplify right side
    1,378.29x = 938,964.21
  5. Step 5: Solve for x
    x = 938,964.21/1,378.29
  6. Step 6: Final answer
    x = 681.25

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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.