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Finding the Fourth Proportional to 659.81, 989.97 and 294.34

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Solution

The fourth proportional to 659.81, 989.97 and 294.34 is: 441.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.81 : 989.97 = 294.34 : x
  2. Step 2: Convert to fraction form
    659.81/989.97 = 294.34/x
  3. Step 3: Cross multiply
    659.81x = 989.97 × 294.34
  4. Step 4: Simplify right side
    659.81x = 291,385.29
  5. Step 5: Solve for x
    x = 291,385.29/659.81
  6. Step 6: Final answer
    x = 441.62

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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.