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Finding the Fourth Proportional to 722.02, 991.59 and 605.38

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Solution

The fourth proportional to 722.02, 991.59 and 605.38 is: 831.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.02 : 991.59 = 605.38 : x
  2. Step 2: Convert to fraction form
    722.02/991.59 = 605.38/x
  3. Step 3: Cross multiply
    722.02x = 991.59 × 605.38
  4. Step 4: Simplify right side
    722.02x = 600,285.73
  5. Step 5: Solve for x
    x = 600,285.73/722.02
  6. Step 6: Final answer
    x = 831.40

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.