Home / 820.27-1,229.95-332.75

Finding the Fourth Proportional to 820.27, 1,229.95 and 332.75

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Solution

The fourth proportional to 820.27, 1,229.95 and 332.75 is: 498.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.27 : 1,229.95 = 332.75 : x
  2. Step 2: Convert to fraction form
    820.27/1,229.95 = 332.75/x
  3. Step 3: Cross multiply
    820.27x = 1,229.95 × 332.75
  4. Step 4: Simplify right side
    820.27x = 409,268.11
  5. Step 5: Solve for x
    x = 409,268.11/820.27
  6. Step 6: Final answer
    x = 498.94

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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.