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Finding the Fourth Proportional to 688.95, 1,033.55 and 226.76

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Solution

The fourth proportional to 688.95, 1,033.55 and 226.76 is: 340.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.95 : 1,033.55 = 226.76 : x
  2. Step 2: Convert to fraction form
    688.95/1,033.55 = 226.76/x
  3. Step 3: Cross multiply
    688.95x = 1,033.55 × 226.76
  4. Step 4: Simplify right side
    688.95x = 234,363.20
  5. Step 5: Solve for x
    x = 234,363.20/688.95
  6. Step 6: Final answer
    x = 340.17

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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.