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Finding the Fourth Proportional to 798.66, 1,102.08 and 449.30

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Solution

The fourth proportional to 798.66, 1,102.08 and 449.30 is: 619.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.66 : 1,102.08 = 449.30 : x
  2. Step 2: Convert to fraction form
    798.66/1,102.08 = 449.30/x
  3. Step 3: Cross multiply
    798.66x = 1,102.08 × 449.30
  4. Step 4: Simplify right side
    798.66x = 495,164.54
  5. Step 5: Solve for x
    x = 495,164.54/798.66
  6. Step 6: Final answer
    x = 619.99

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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.