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Finding the Fourth Proportional to 844.22, 1,165.56 and 647.36

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Solution

The fourth proportional to 844.22, 1,165.56 and 647.36 is: 893.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.22 : 1,165.56 = 647.36 : x
  2. Step 2: Convert to fraction form
    844.22/1,165.56 = 647.36/x
  3. Step 3: Cross multiply
    844.22x = 1,165.56 × 647.36
  4. Step 4: Simplify right side
    844.22x = 754,536.92
  5. Step 5: Solve for x
    x = 754,536.92/844.22
  6. Step 6: Final answer
    x = 893.77

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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.