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Finding the Fourth Proportional to 888.66, 1,226.21 and 816.98

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Solution

The fourth proportional to 888.66, 1,226.21 and 816.98 is: 1,127.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.66 : 1,226.21 = 816.98 : x
  2. Step 2: Convert to fraction form
    888.66/1,226.21 = 816.98/x
  3. Step 3: Cross multiply
    888.66x = 1,226.21 × 816.98
  4. Step 4: Simplify right side
    888.66x = 1,001,778.83
  5. Step 5: Solve for x
    x = 1,001,778.83/888.66
  6. Step 6: Final answer
    x = 1,127.29

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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.