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Finding the Fourth Proportional to 637.10, 879.24 and 388.38

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Solution

The fourth proportional to 637.10, 879.24 and 388.38 is: 535.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.10 : 879.24 = 388.38 : x
  2. Step 2: Convert to fraction form
    637.10/879.24 = 388.38/x
  3. Step 3: Cross multiply
    637.10x = 879.24 × 388.38
  4. Step 4: Simplify right side
    637.10x = 341,479.23
  5. Step 5: Solve for x
    x = 341,479.23/637.10
  6. Step 6: Final answer
    x = 535.99

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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.