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Finding the Fourth Proportional to 650.89, 898.23 and 388.90

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Solution

The fourth proportional to 650.89, 898.23 and 388.90 is: 536.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.89 : 898.23 = 388.90 : x
  2. Step 2: Convert to fraction form
    650.89/898.23 = 388.90/x
  3. Step 3: Cross multiply
    650.89x = 898.23 × 388.90
  4. Step 4: Simplify right side
    650.89x = 349,321.65
  5. Step 5: Solve for x
    x = 349,321.65/650.89
  6. Step 6: Final answer
    x = 536.68

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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.