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Finding the Fourth Proportional to 639.19, 881.26 and 473.12

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Solution

The fourth proportional to 639.19, 881.26 and 473.12 is: 652.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.19 : 881.26 = 473.12 : x
  2. Step 2: Convert to fraction form
    639.19/881.26 = 473.12/x
  3. Step 3: Cross multiply
    639.19x = 881.26 × 473.12
  4. Step 4: Simplify right side
    639.19x = 416,936.14
  5. Step 5: Solve for x
    x = 416,936.14/639.19
  6. Step 6: Final answer
    x = 652.29

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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.