Home / 2,679.20-4,018.85-731.45

Finding the Fourth Proportional to 2,679.20, 4,018.85 and 731.45

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Solution

The fourth proportional to 2,679.20, 4,018.85 and 731.45 is: 1,097.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.20 : 4,018.85 = 731.45 : x
  2. Step 2: Convert to fraction form
    2,679.20/4,018.85 = 731.45/x
  3. Step 3: Cross multiply
    2,679.20x = 4,018.85 × 731.45
  4. Step 4: Simplify right side
    2,679.20x = 2,939,564.08
  5. Step 5: Solve for x
    x = 2,939,564.08/2,679.20
  6. Step 6: Final answer
    x = 1,097.18

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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.