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Finding the Fourth Proportional to 872.84, 1,204.34 and 536.90

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Solution

The fourth proportional to 872.84, 1,204.34 and 536.90 is: 740.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.84 : 1,204.34 = 536.90 : x
  2. Step 2: Convert to fraction form
    872.84/1,204.34 = 536.90/x
  3. Step 3: Cross multiply
    872.84x = 1,204.34 × 536.90
  4. Step 4: Simplify right side
    872.84x = 646,601.44
  5. Step 5: Solve for x
    x = 646,601.44/872.84
  6. Step 6: Final answer
    x = 740.80

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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.