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Finding the Fourth Proportional to 488.20, 732.20 and 228.20

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Solution

The fourth proportional to 488.20, 732.20 and 228.20 is: 342.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.20 : 732.20 = 228.20 : x
  2. Step 2: Convert to fraction form
    488.20/732.20 = 228.20/x
  3. Step 3: Cross multiply
    488.20x = 732.20 × 228.20
  4. Step 4: Simplify right side
    488.20x = 167,088.04
  5. Step 5: Solve for x
    x = 167,088.04/488.20
  6. Step 6: Final answer
    x = 342.25

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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.