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Finding the Fourth Proportional to 303.24, 453.78 and 210.72

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Solution

The fourth proportional to 303.24, 453.78 and 210.72 is: 315.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.24 : 453.78 = 210.72 : x
  2. Step 2: Convert to fraction form
    303.24/453.78 = 210.72/x
  3. Step 3: Cross multiply
    303.24x = 453.78 × 210.72
  4. Step 4: Simplify right side
    303.24x = 95,620.52
  5. Step 5: Solve for x
    x = 95,620.52/303.24
  6. Step 6: Final answer
    x = 315.33

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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.