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Finding the Fourth Proportional to 659.56, 910.08 and 379.72

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Solution

The fourth proportional to 659.56, 910.08 and 379.72 is: 523.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.56 : 910.08 = 379.72 : x
  2. Step 2: Convert to fraction form
    659.56/910.08 = 379.72/x
  3. Step 3: Cross multiply
    659.56x = 910.08 × 379.72
  4. Step 4: Simplify right side
    659.56x = 345,575.58
  5. Step 5: Solve for x
    x = 345,575.58/659.56
  6. Step 6: Final answer
    x = 523.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.