Home / 3,578.96-5,365.56-1,387.28

Finding the Fourth Proportional to 3,578.96, 5,365.56 and 1,387.28

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Solution

The fourth proportional to 3,578.96, 5,365.56 and 1,387.28 is: 2,079.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,578.96 : 5,365.56 = 1,387.28 : x
  2. Step 2: Convert to fraction form
    3,578.96/5,365.56 = 1,387.28/x
  3. Step 3: Cross multiply
    3,578.96x = 5,365.56 × 1,387.28
  4. Step 4: Simplify right side
    3,578.96x = 7,443,534.08
  5. Step 5: Solve for x
    x = 7,443,534.08/3,578.96
  6. Step 6: Final answer
    x = 2,079.80

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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.