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Finding the Fourth Proportional to 660.29, 989.78 and 295.34

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Solution

The fourth proportional to 660.29, 989.78 and 295.34 is: 442.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.29 : 989.78 = 295.34 : x
  2. Step 2: Convert to fraction form
    660.29/989.78 = 295.34/x
  3. Step 3: Cross multiply
    660.29x = 989.78 × 295.34
  4. Step 4: Simplify right side
    660.29x = 292,315.20
  5. Step 5: Solve for x
    x = 292,315.20/660.29
  6. Step 6: Final answer
    x = 442.71

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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.