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Finding the Fourth Proportional to 637.10, 879.19 and 388.43

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Solution

The fourth proportional to 637.10, 879.19 and 388.43 is: 536.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.10 : 879.19 = 388.43 : x
  2. Step 2: Convert to fraction form
    637.10/879.19 = 388.43/x
  3. Step 3: Cross multiply
    637.10x = 879.19 × 388.43
  4. Step 4: Simplify right side
    637.10x = 341,501.70
  5. Step 5: Solve for x
    x = 341,501.70/637.10
  6. Step 6: Final answer
    x = 536.03

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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.