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Finding the Fourth Proportional to 1,244.85, 1,866.72 and 378.96

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Solution

The fourth proportional to 1,244.85, 1,866.72 and 378.96 is: 568.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.85 : 1,866.72 = 378.96 : x
  2. Step 2: Convert to fraction form
    1,244.85/1,866.72 = 378.96/x
  3. Step 3: Cross multiply
    1,244.85x = 1,866.72 × 378.96
  4. Step 4: Simplify right side
    1,244.85x = 707,412.21
  5. Step 5: Solve for x
    x = 707,412.21/1,244.85
  6. Step 6: Final answer
    x = 568.27

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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.