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Finding the Fourth Proportional to 722.67, 1,084.82 and 290.13

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Solution

The fourth proportional to 722.67, 1,084.82 and 290.13 is: 435.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.67 : 1,084.82 = 290.13 : x
  2. Step 2: Convert to fraction form
    722.67/1,084.82 = 290.13/x
  3. Step 3: Cross multiply
    722.67x = 1,084.82 × 290.13
  4. Step 4: Simplify right side
    722.67x = 314,738.83
  5. Step 5: Solve for x
    x = 314,738.83/722.67
  6. Step 6: Final answer
    x = 435.52

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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.