Home / 1,378.29-2,067.45-1,057.53

Finding the Fourth Proportional to 1,378.29, 2,067.45 and 1,057.53

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Solution

The fourth proportional to 1,378.29, 2,067.45 and 1,057.53 is: 1,586.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.29 : 2,067.45 = 1,057.53 : x
  2. Step 2: Convert to fraction form
    1,378.29/2,067.45 = 1,057.53/x
  3. Step 3: Cross multiply
    1,378.29x = 2,067.45 × 1,057.53
  4. Step 4: Simplify right side
    1,378.29x = 2,186,390.40
  5. Step 5: Solve for x
    x = 2,186,390.40/1,378.29
  6. Step 6: Final answer
    x = 1,586.31

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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.