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Finding the Fourth Proportional to 637.12, 879 and 361.12

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Solution

The fourth proportional to 637.12, 879 and 361.12 is: 498.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.12 : 879 = 361.12 : x
  2. Step 2: Convert to fraction form
    637.12/879 = 361.12/x
  3. Step 3: Cross multiply
    637.12x = 879 × 361.12
  4. Step 4: Simplify right side
    637.12x = 317,424.48
  5. Step 5: Solve for x
    x = 317,424.48/637.12
  6. Step 6: Final answer
    x = 498.22

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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.