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Finding the Fourth Proportional to 650.38, 897.38 and 388.30

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Solution

The fourth proportional to 650.38, 897.38 and 388.30 is: 535.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.38 : 897.38 = 388.30 : x
  2. Step 2: Convert to fraction form
    650.38/897.38 = 388.30/x
  3. Step 3: Cross multiply
    650.38x = 897.38 × 388.30
  4. Step 4: Simplify right side
    650.38x = 348,452.65
  5. Step 5: Solve for x
    x = 348,452.65/650.38
  6. Step 6: Final answer
    x = 535.77

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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.