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Finding the Fourth Proportional to 722.45, 1,083.68 and 579.08

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Solution

The fourth proportional to 722.45, 1,083.68 and 579.08 is: 868.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.45 : 1,083.68 = 579.08 : x
  2. Step 2: Convert to fraction form
    722.45/1,083.68 = 579.08/x
  3. Step 3: Cross multiply
    722.45x = 1,083.68 × 579.08
  4. Step 4: Simplify right side
    722.45x = 627,529.10
  5. Step 5: Solve for x
    x = 627,529.10/722.45
  6. Step 6: Final answer
    x = 868.62

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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.