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Finding the Fourth Proportional to 850.84, 1,173.44 and 718.71

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Solution

The fourth proportional to 850.84, 1,173.44 and 718.71 is: 991.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.84 : 1,173.44 = 718.71 : x
  2. Step 2: Convert to fraction form
    850.84/1,173.44 = 718.71/x
  3. Step 3: Cross multiply
    850.84x = 1,173.44 × 718.71
  4. Step 4: Simplify right side
    850.84x = 843,363.06
  5. Step 5: Solve for x
    x = 843,363.06/850.84
  6. Step 6: Final answer
    x = 991.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.