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Finding the Fourth Proportional to 488.16, 732.72 and 272.16

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Solution

The fourth proportional to 488.16, 732.72 and 272.16 is: 408.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.16 : 732.72 = 272.16 : x
  2. Step 2: Convert to fraction form
    488.16/732.72 = 272.16/x
  3. Step 3: Cross multiply
    488.16x = 732.72 × 272.16
  4. Step 4: Simplify right side
    488.16x = 199,417.08
  5. Step 5: Solve for x
    x = 199,417.08/488.16
  6. Step 6: Final answer
    x = 408.51

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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.