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Finding the Fourth Proportional to 798.81, 1,102.43 and 449.57

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Solution

The fourth proportional to 798.81, 1,102.43 and 449.57 is: 620.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.81 : 1,102.43 = 449.57 : x
  2. Step 2: Convert to fraction form
    798.81/1,102.43 = 449.57/x
  3. Step 3: Cross multiply
    798.81x = 1,102.43 × 449.57
  4. Step 4: Simplify right side
    798.81x = 495,619.46
  5. Step 5: Solve for x
    x = 495,619.46/798.81
  6. Step 6: Final answer
    x = 620.45

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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.