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Finding the Fourth Proportional to 1,244.58, 1,866.87 and 378.90

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Solution

The fourth proportional to 1,244.58, 1,866.87 and 378.90 is: 568.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.58 : 1,866.87 = 378.90 : x
  2. Step 2: Convert to fraction form
    1,244.58/1,866.87 = 378.90/x
  3. Step 3: Cross multiply
    1,244.58x = 1,866.87 × 378.90
  4. Step 4: Simplify right side
    1,244.58x = 707,357.04
  5. Step 5: Solve for x
    x = 707,357.04/1,244.58
  6. Step 6: Final answer
    x = 568.35

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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.