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Finding the Fourth Proportional to 639.44, 880.25 and 473.34

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Solution

The fourth proportional to 639.44, 880.25 and 473.34 is: 651.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.44 : 880.25 = 473.34 : x
  2. Step 2: Convert to fraction form
    639.44/880.25 = 473.34/x
  3. Step 3: Cross multiply
    639.44x = 880.25 × 473.34
  4. Step 4: Simplify right side
    639.44x = 416,655.17
  5. Step 5: Solve for x
    x = 416,655.17/639.44
  6. Step 6: Final answer
    x = 651.59

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Double scale
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1.5x scale

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.