Home / 5,478.57-8,215.40-3,398.49

Finding the Fourth Proportional to 5,478.57, 8,215.40 and 3,398.49

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Solution

The fourth proportional to 5,478.57, 8,215.40 and 3,398.49 is: 5,096.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,478.57 : 8,215.40 = 3,398.49 : x
  2. Step 2: Convert to fraction form
    5,478.57/8,215.40 = 3,398.49/x
  3. Step 3: Cross multiply
    5,478.57x = 8,215.40 × 3,398.49
  4. Step 4: Simplify right side
    5,478.57x = 27,919,963.24
  5. Step 5: Solve for x
    x = 27,919,963.24/5,478.57
  6. Step 6: Final answer
    x = 5,096.21

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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.