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Finding the Fourth Proportional to 690.13, 1,035.30 and 227.96

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Solution

The fourth proportional to 690.13, 1,035.30 and 227.96 is: 341.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.13 : 1,035.30 = 227.96 : x
  2. Step 2: Convert to fraction form
    690.13/1,035.30 = 227.96/x
  3. Step 3: Cross multiply
    690.13x = 1,035.30 × 227.96
  4. Step 4: Simplify right side
    690.13x = 236,004.40
  5. Step 5: Solve for x
    x = 236,004.40/690.13
  6. Step 6: Final answer
    x = 341.97

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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.