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Finding the Fourth Proportional to 476.49, 657.75 and 310.85

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Solution

The fourth proportional to 476.49, 657.75 and 310.85 is: 429.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.49 : 657.75 = 310.85 : x
  2. Step 2: Convert to fraction form
    476.49/657.75 = 310.85/x
  3. Step 3: Cross multiply
    476.49x = 657.75 × 310.85
  4. Step 4: Simplify right side
    476.49x = 204,461.59
  5. Step 5: Solve for x
    x = 204,461.59/476.49
  6. Step 6: Final answer
    x = 429.10

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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.