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Finding the Fourth Proportional to 465.40, 697.86 and 140.73

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Solution

The fourth proportional to 465.40, 697.86 and 140.73 is: 211.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.40 : 697.86 = 140.73 : x
  2. Step 2: Convert to fraction form
    465.40/697.86 = 140.73/x
  3. Step 3: Cross multiply
    465.40x = 697.86 × 140.73
  4. Step 4: Simplify right side
    465.40x = 98,209.84
  5. Step 5: Solve for x
    x = 98,209.84/465.40
  6. Step 6: Final answer
    x = 211.02

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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.