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Finding the Fourth Proportional to 146.51, 219.80 and 43.80

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Solution

The fourth proportional to 146.51, 219.80 and 43.80 is: 65.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.51 : 219.80 = 43.80 : x
  2. Step 2: Convert to fraction form
    146.51/219.80 = 43.80/x
  3. Step 3: Cross multiply
    146.51x = 219.80 × 43.80
  4. Step 4: Simplify right side
    146.51x = 9,626.25
  5. Step 5: Solve for x
    x = 9,626.25/146.51
  6. Step 6: Final answer
    x = 65.70

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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.