Home / 1,398.28-2,094.49-667.12

Finding the Fourth Proportional to 1,398.28, 2,094.49 and 667.12

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Solution

The fourth proportional to 1,398.28, 2,094.49 and 667.12 is: 999.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.28 : 2,094.49 = 667.12 : x
  2. Step 2: Convert to fraction form
    1,398.28/2,094.49 = 667.12/x
  3. Step 3: Cross multiply
    1,398.28x = 2,094.49 × 667.12
  4. Step 4: Simplify right side
    1,398.28x = 1,397,276.17
  5. Step 5: Solve for x
    x = 1,397,276.17/1,398.28
  6. Step 6: Final answer
    x = 999.28

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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.