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Finding the Fourth Proportional to 611.84, 850.13 and 605.42

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Solution

The fourth proportional to 611.84, 850.13 and 605.42 is: 841.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.84 : 850.13 = 605.42 : x
  2. Step 2: Convert to fraction form
    611.84/850.13 = 605.42/x
  3. Step 3: Cross multiply
    611.84x = 850.13 × 605.42
  4. Step 4: Simplify right side
    611.84x = 514,678.43
  5. Step 5: Solve for x
    x = 514,678.43/611.84
  6. Step 6: Final answer
    x = 841.20

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.