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Finding the Fourth Proportional to 475.96, 656.80 and 279.58

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Solution

The fourth proportional to 475.96, 656.80 and 279.58 is: 385.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.96 : 656.80 = 279.58 : x
  2. Step 2: Convert to fraction form
    475.96/656.80 = 279.58/x
  3. Step 3: Cross multiply
    475.96x = 656.80 × 279.58
  4. Step 4: Simplify right side
    475.96x = 183,628.14
  5. Step 5: Solve for x
    x = 183,628.14/475.96
  6. Step 6: Final answer
    x = 385.81

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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.