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Finding the Fourth Proportional to 722.68, 1,084.02 and 311.41

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Solution

The fourth proportional to 722.68, 1,084.02 and 311.41 is: 467.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.68 : 1,084.02 = 311.41 : x
  2. Step 2: Convert to fraction form
    722.68/1,084.02 = 311.41/x
  3. Step 3: Cross multiply
    722.68x = 1,084.02 × 311.41
  4. Step 4: Simplify right side
    722.68x = 337,574.67
  5. Step 5: Solve for x
    x = 337,574.67/722.68
  6. Step 6: Final answer
    x = 467.12

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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.