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Finding the Fourth Proportional to 475.58, 656.57 and 328.43

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Solution

The fourth proportional to 475.58, 656.57 and 328.43 is: 453.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.58 : 656.57 = 328.43 : x
  2. Step 2: Convert to fraction form
    475.58/656.57 = 328.43/x
  3. Step 3: Cross multiply
    475.58x = 656.57 × 328.43
  4. Step 4: Simplify right side
    475.58x = 215,637.29
  5. Step 5: Solve for x
    x = 215,637.29/475.58
  6. Step 6: Final answer
    x = 453.42

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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.