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Finding the Fourth Proportional to 465.39, 698.22 and 140.81

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Solution

The fourth proportional to 465.39, 698.22 and 140.81 is: 211.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.39 : 698.22 = 140.81 : x
  2. Step 2: Convert to fraction form
    465.39/698.22 = 140.81/x
  3. Step 3: Cross multiply
    465.39x = 698.22 × 140.81
  4. Step 4: Simplify right side
    465.39x = 98,312.87
  5. Step 5: Solve for x
    x = 98,312.87/465.39
  6. Step 6: Final answer
    x = 211.25

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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.