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Finding the Fourth Proportional to 844.64, 1,166.64 and 638.56

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Solution

The fourth proportional to 844.64, 1,166.64 and 638.56 is: 882.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.64 : 1,166.64 = 638.56 : x
  2. Step 2: Convert to fraction form
    844.64/1,166.64 = 638.56/x
  3. Step 3: Cross multiply
    844.64x = 1,166.64 × 638.56
  4. Step 4: Simplify right side
    844.64x = 744,969.64
  5. Step 5: Solve for x
    x = 744,969.64/844.64
  6. Step 6: Final answer
    x = 882.00

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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.