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Finding the Fourth Proportional to 637.39, 878.88 and 450.55

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Solution

The fourth proportional to 637.39, 878.88 and 450.55 is: 621.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.39 : 878.88 = 450.55 : x
  2. Step 2: Convert to fraction form
    637.39/878.88 = 450.55/x
  3. Step 3: Cross multiply
    637.39x = 878.88 × 450.55
  4. Step 4: Simplify right side
    637.39x = 395,979.38
  5. Step 5: Solve for x
    x = 395,979.38/637.39
  6. Step 6: Final answer
    x = 621.25

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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.