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Finding the Fourth Proportional to 822.89, 1,136.08 and 656.43

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Solution

The fourth proportional to 822.89, 1,136.08 and 656.43 is: 906.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.89 : 1,136.08 = 656.43 : x
  2. Step 2: Convert to fraction form
    822.89/1,136.08 = 656.43/x
  3. Step 3: Cross multiply
    822.89x = 1,136.08 × 656.43
  4. Step 4: Simplify right side
    822.89x = 745,756.99
  5. Step 5: Solve for x
    x = 745,756.99/822.89
  6. Step 6: Final answer
    x = 906.27

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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.