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Finding the Fourth Proportional to 465.51, 698.34 and 140.90

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Solution

The fourth proportional to 465.51, 698.34 and 140.90 is: 211.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.51 : 698.34 = 140.90 : x
  2. Step 2: Convert to fraction form
    465.51/698.34 = 140.90/x
  3. Step 3: Cross multiply
    465.51x = 698.34 × 140.90
  4. Step 4: Simplify right side
    465.51x = 98,392.61
  5. Step 5: Solve for x
    x = 98,392.61/465.51
  6. Step 6: Final answer
    x = 211.37

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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.