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Finding the Fourth Proportional to 650.70, 897.89 and 388.67

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Solution

The fourth proportional to 650.70, 897.89 and 388.67 is: 536.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.70 : 897.89 = 388.67 : x
  2. Step 2: Convert to fraction form
    650.70/897.89 = 388.67/x
  3. Step 3: Cross multiply
    650.70x = 897.89 × 388.67
  4. Step 4: Simplify right side
    650.70x = 348,982.91
  5. Step 5: Solve for x
    x = 348,982.91/650.70
  6. Step 6: Final answer
    x = 536.32

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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.