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Finding the Fourth Proportional to 722.20, 1,083.41 and 235.14

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Solution

The fourth proportional to 722.20, 1,083.41 and 235.14 is: 352.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.20 : 1,083.41 = 235.14 : x
  2. Step 2: Convert to fraction form
    722.20/1,083.41 = 235.14/x
  3. Step 3: Cross multiply
    722.20x = 1,083.41 × 235.14
  4. Step 4: Simplify right side
    722.20x = 254,747.61
  5. Step 5: Solve for x
    x = 254,747.61/722.20
  6. Step 6: Final answer
    x = 352.74

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1.5x scale

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.