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Finding the Fourth Proportional to 637.66, 878.88 and 480.25

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Solution

The fourth proportional to 637.66, 878.88 and 480.25 is: 661.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.66 : 878.88 = 480.25 : x
  2. Step 2: Convert to fraction form
    637.66/878.88 = 480.25/x
  3. Step 3: Cross multiply
    637.66x = 878.88 × 480.25
  4. Step 4: Simplify right side
    637.66x = 422,082.12
  5. Step 5: Solve for x
    x = 422,082.12/637.66
  6. Step 6: Final answer
    x = 661.92

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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.