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Finding the Fourth Proportional to 638.82, 880.99 and 473.45

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Solution

The fourth proportional to 638.82, 880.99 and 473.45 is: 652.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.82 : 880.99 = 473.45 : x
  2. Step 2: Convert to fraction form
    638.82/880.99 = 473.45/x
  3. Step 3: Cross multiply
    638.82x = 880.99 × 473.45
  4. Step 4: Simplify right side
    638.82x = 417,099.13
  5. Step 5: Solve for x
    x = 417,099.13/638.82
  6. Step 6: Final answer
    x = 652.92

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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.