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Finding the Fourth Proportional to 638.56, 881.12 and 362.56

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Solution

The fourth proportional to 638.56, 881.12 and 362.56 is: 500.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.56 : 881.12 = 362.56 : x
  2. Step 2: Convert to fraction form
    638.56/881.12 = 362.56/x
  3. Step 3: Cross multiply
    638.56x = 881.12 × 362.56
  4. Step 4: Simplify right side
    638.56x = 319,458.87
  5. Step 5: Solve for x
    x = 319,458.87/638.56
  6. Step 6: Final answer
    x = 500.28

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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.