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Finding the Fourth Proportional to 689.82, 1,035.10 and 294.46

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Solution

The fourth proportional to 689.82, 1,035.10 and 294.46 is: 441.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.82 : 1,035.10 = 294.46 : x
  2. Step 2: Convert to fraction form
    689.82/1,035.10 = 294.46/x
  3. Step 3: Cross multiply
    689.82x = 1,035.10 × 294.46
  4. Step 4: Simplify right side
    689.82x = 304,797.07
  5. Step 5: Solve for x
    x = 304,797.07/689.82
  6. Step 6: Final answer
    x = 441.85

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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.