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Finding the Fourth Proportional to 1,333.44, 1,999.80 and 839.52

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Solution

The fourth proportional to 1,333.44, 1,999.80 and 839.52 is: 1,259.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333.44 : 1,999.80 = 839.52 : x
  2. Step 2: Convert to fraction form
    1,333.44/1,999.80 = 839.52/x
  3. Step 3: Cross multiply
    1,333.44x = 1,999.80 × 839.52
  4. Step 4: Simplify right side
    1,333.44x = 1,678,872.10
  5. Step 5: Solve for x
    x = 1,678,872.10/1,333.44
  6. Step 6: Final answer
    x = 1,259.05

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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.