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Finding the Fourth Proportional to 397, 595.77 and 140.50

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Solution

The fourth proportional to 397, 595.77 and 140.50 is: 210.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    397 : 595.77 = 140.50 : x
  2. Step 2: Convert to fraction form
    397/595.77 = 140.50/x
  3. Step 3: Cross multiply
    397x = 595.77 × 140.50
  4. Step 4: Simplify right side
    397x = 83,705.69
  5. Step 5: Solve for x
    x = 83,705.69/397
  6. Step 6: Final answer
    x = 210.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.