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Finding the Fourth Proportional to 639.74, 882.84 and 453.04

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Solution

The fourth proportional to 639.74, 882.84 and 453.04 is: 625.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.74 : 882.84 = 453.04 : x
  2. Step 2: Convert to fraction form
    639.74/882.84 = 453.04/x
  3. Step 3: Cross multiply
    639.74x = 882.84 × 453.04
  4. Step 4: Simplify right side
    639.74x = 399,961.83
  5. Step 5: Solve for x
    x = 399,961.83/639.74
  6. Step 6: Final answer
    x = 625.19

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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.