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Finding the Fourth Proportional to 659.32, 989.12 and 226.45

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Solution

The fourth proportional to 659.32, 989.12 and 226.45 is: 339.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.32 : 989.12 = 226.45 : x
  2. Step 2: Convert to fraction form
    659.32/989.12 = 226.45/x
  3. Step 3: Cross multiply
    659.32x = 989.12 × 226.45
  4. Step 4: Simplify right side
    659.32x = 223,981.84
  5. Step 5: Solve for x
    x = 223,981.84/659.32
  6. Step 6: Final answer
    x = 339.72

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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.