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Finding the Fourth Proportional to 476.69, 657.41 and 310.84

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Solution

The fourth proportional to 476.69, 657.41 and 310.84 is: 428.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.69 : 657.41 = 310.84 : x
  2. Step 2: Convert to fraction form
    476.69/657.41 = 310.84/x
  3. Step 3: Cross multiply
    476.69x = 657.41 × 310.84
  4. Step 4: Simplify right side
    476.69x = 204,348.46
  5. Step 5: Solve for x
    x = 204,348.46/476.69
  6. Step 6: Final answer
    x = 428.69

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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.