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Finding the Fourth Proportional to 711.33, 1,066.63 and 326.25

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Solution

The fourth proportional to 711.33, 1,066.63 and 326.25 is: 489.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.33 : 1,066.63 = 326.25 : x
  2. Step 2: Convert to fraction form
    711.33/1,066.63 = 326.25/x
  3. Step 3: Cross multiply
    711.33x = 1,066.63 × 326.25
  4. Step 4: Simplify right side
    711.33x = 347,988.04
  5. Step 5: Solve for x
    x = 347,988.04/711.33
  6. Step 6: Final answer
    x = 489.21

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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.