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Finding the Fourth Proportional to 488.50, 732.75 and 146.50

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Solution

The fourth proportional to 488.50, 732.75 and 146.50 is: 219.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.50 : 732.75 = 146.50 : x
  2. Step 2: Convert to fraction form
    488.50/732.75 = 146.50/x
  3. Step 3: Cross multiply
    488.50x = 732.75 × 146.50
  4. Step 4: Simplify right side
    488.50x = 107,347.88
  5. Step 5: Solve for x
    x = 107,347.88/488.50
  6. Step 6: Final answer
    x = 219.75

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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.