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Finding the Fourth Proportional to 488.36, 732.12 and 214.20

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Solution

The fourth proportional to 488.36, 732.12 and 214.20 is: 321.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.36 : 732.12 = 214.20 : x
  2. Step 2: Convert to fraction form
    488.36/732.12 = 214.20/x
  3. Step 3: Cross multiply
    488.36x = 732.12 × 214.20
  4. Step 4: Simplify right side
    488.36x = 156,820.10
  5. Step 5: Solve for x
    x = 156,820.10/488.36
  6. Step 6: Final answer
    x = 321.12

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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.