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Finding the Fourth Proportional to 637.01, 879.35 and 388.41

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Solution

The fourth proportional to 637.01, 879.35 and 388.41 is: 536.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.01 : 879.35 = 388.41 : x
  2. Step 2: Convert to fraction form
    637.01/879.35 = 388.41/x
  3. Step 3: Cross multiply
    637.01x = 879.35 × 388.41
  4. Step 4: Simplify right side
    637.01x = 341,546.39
  5. Step 5: Solve for x
    x = 341,546.39/637.01
  6. Step 6: Final answer
    x = 536.18

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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.