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Finding the Fourth Proportional to 1,333.30, 1,999.94 and 749.14

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Solution

The fourth proportional to 1,333.30, 1,999.94 and 749.14 is: 1,123.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333.30 : 1,999.94 = 749.14 : x
  2. Step 2: Convert to fraction form
    1,333.30/1,999.94 = 749.14/x
  3. Step 3: Cross multiply
    1,333.30x = 1,999.94 × 749.14
  4. Step 4: Simplify right side
    1,333.30x = 1,498,235.05
  5. Step 5: Solve for x
    x = 1,498,235.05/1,333.30
  6. Step 6: Final answer
    x = 1,123.70

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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.