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Finding the Fourth Proportional to 1,244, 1,866.10 and 378.31

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Solution

The fourth proportional to 1,244, 1,866.10 and 378.31 is: 567.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244 : 1,866.10 = 378.31 : x
  2. Step 2: Convert to fraction form
    1,244/1,866.10 = 378.31/x
  3. Step 3: Cross multiply
    1,244x = 1,866.10 × 378.31
  4. Step 4: Simplify right side
    1,244x = 705,964.29
  5. Step 5: Solve for x
    x = 705,964.29/1,244
  6. Step 6: Final answer
    x = 567.50

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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.