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Finding the Fourth Proportional to 326.12, 488.74 and 152.86

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Solution

The fourth proportional to 326.12, 488.74 and 152.86 is: 229.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.12 : 488.74 = 152.86 : x
  2. Step 2: Convert to fraction form
    326.12/488.74 = 152.86/x
  3. Step 3: Cross multiply
    326.12x = 488.74 × 152.86
  4. Step 4: Simplify right side
    326.12x = 74,708.80
  5. Step 5: Solve for x
    x = 74,708.80/326.12
  6. Step 6: Final answer
    x = 229.08

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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.