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Finding the Fourth Proportional to 688.80, 1,032.96 and 226.46

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Solution

The fourth proportional to 688.80, 1,032.96 and 226.46 is: 339.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.80 : 1,032.96 = 226.46 : x
  2. Step 2: Convert to fraction form
    688.80/1,032.96 = 226.46/x
  3. Step 3: Cross multiply
    688.80x = 1,032.96 × 226.46
  4. Step 4: Simplify right side
    688.80x = 233,918.96
  5. Step 5: Solve for x
    x = 233,918.96/688.80
  6. Step 6: Final answer
    x = 339.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.