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Finding the Fourth Proportional to 637.31, 879.33 and 401.19

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Solution

The fourth proportional to 637.31, 879.33 and 401.19 is: 553.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.31 : 879.33 = 401.19 : x
  2. Step 2: Convert to fraction form
    637.31/879.33 = 401.19/x
  3. Step 3: Cross multiply
    637.31x = 879.33 × 401.19
  4. Step 4: Simplify right side
    637.31x = 352,778.40
  5. Step 5: Solve for x
    x = 352,778.40/637.31
  6. Step 6: Final answer
    x = 553.55

Related Problems

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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.