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Finding the Fourth Proportional to 738.12, 1,106.93 and 217.99

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Solution

The fourth proportional to 738.12, 1,106.93 and 217.99 is: 326.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.12 : 1,106.93 = 217.99 : x
  2. Step 2: Convert to fraction form
    738.12/1,106.93 = 217.99/x
  3. Step 3: Cross multiply
    738.12x = 1,106.93 × 217.99
  4. Step 4: Simplify right side
    738.12x = 241,294.97
  5. Step 5: Solve for x
    x = 241,294.97/738.12
  6. Step 6: Final answer
    x = 326.90

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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.