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Finding the Fourth Proportional to 476.28, 656.10 and 328.66

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Solution

The fourth proportional to 476.28, 656.10 and 328.66 is: 452.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.28 : 656.10 = 328.66 : x
  2. Step 2: Convert to fraction form
    476.28/656.10 = 328.66/x
  3. Step 3: Cross multiply
    476.28x = 656.10 × 328.66
  4. Step 4: Simplify right side
    476.28x = 215,632.19
  5. Step 5: Solve for x
    x = 215,632.19/476.28
  6. Step 6: Final answer
    x = 452.74

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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.