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Finding the Fourth Proportional to 1,334.88, 2,001.87 and 685.53

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Solution

The fourth proportional to 1,334.88, 2,001.87 and 685.53 is: 1,028.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,334.88 : 2,001.87 = 685.53 : x
  2. Step 2: Convert to fraction form
    1,334.88/2,001.87 = 685.53/x
  3. Step 3: Cross multiply
    1,334.88x = 2,001.87 × 685.53
  4. Step 4: Simplify right side
    1,334.88x = 1,372,341.94
  5. Step 5: Solve for x
    x = 1,372,341.94/1,334.88
  6. Step 6: Final answer
    x = 1,028.06

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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.