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Finding the Fourth Proportional to 1,449.38, 1,999.24 and 859.50

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Solution

The fourth proportional to 1,449.38, 1,999.24 and 859.50 is: 1,185.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.38 : 1,999.24 = 859.50 : x
  2. Step 2: Convert to fraction form
    1,449.38/1,999.24 = 859.50/x
  3. Step 3: Cross multiply
    1,449.38x = 1,999.24 × 859.50
  4. Step 4: Simplify right side
    1,449.38x = 1,718,344.63
  5. Step 5: Solve for x
    x = 1,718,344.63/1,449.38
  6. Step 6: Final answer
    x = 1,185.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.