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Finding the Fourth Proportional to 326.34, 489.65 and 245.75

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Solution

The fourth proportional to 326.34, 489.65 and 245.75 is: 368.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.34 : 489.65 = 245.75 : x
  2. Step 2: Convert to fraction form
    326.34/489.65 = 245.75/x
  3. Step 3: Cross multiply
    326.34x = 489.65 × 245.75
  4. Step 4: Simplify right side
    326.34x = 120,327.81
  5. Step 5: Solve for x
    x = 120,327.81/326.34
  6. Step 6: Final answer
    x = 368.72

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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.