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Finding the Fourth Proportional to 722.25, 1,083.11 and 283.46

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Solution

The fourth proportional to 722.25, 1,083.11 and 283.46 is: 425.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.25 : 1,083.11 = 283.46 : x
  2. Step 2: Convert to fraction form
    722.25/1,083.11 = 283.46/x
  3. Step 3: Cross multiply
    722.25x = 1,083.11 × 283.46
  4. Step 4: Simplify right side
    722.25x = 307,011.53
  5. Step 5: Solve for x
    x = 307,011.53/722.25
  6. Step 6: Final answer
    x = 425.08

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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.