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Finding the Fourth Proportional to 656.76, 985.86 and 332.28

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Solution

The fourth proportional to 656.76, 985.86 and 332.28 is: 498.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.76 : 985.86 = 332.28 : x
  2. Step 2: Convert to fraction form
    656.76/985.86 = 332.28/x
  3. Step 3: Cross multiply
    656.76x = 985.86 × 332.28
  4. Step 4: Simplify right side
    656.76x = 327,581.56
  5. Step 5: Solve for x
    x = 327,581.56/656.76
  6. Step 6: Final answer
    x = 498.78

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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.