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Finding the Fourth Proportional to 475.65, 656.73 and 328.64

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Solution

The fourth proportional to 475.65, 656.73 and 328.64 is: 453.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.65 : 656.73 = 328.64 : x
  2. Step 2: Convert to fraction form
    475.65/656.73 = 328.64/x
  3. Step 3: Cross multiply
    475.65x = 656.73 × 328.64
  4. Step 4: Simplify right side
    475.65x = 215,824.46
  5. Step 5: Solve for x
    x = 215,824.46/475.65
  6. Step 6: Final answer
    x = 453.75

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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.