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Finding the Fourth Proportional to 473.49, 709.92 and 257.22

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Solution

The fourth proportional to 473.49, 709.92 and 257.22 is: 385.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.49 : 709.92 = 257.22 : x
  2. Step 2: Convert to fraction form
    473.49/709.92 = 257.22/x
  3. Step 3: Cross multiply
    473.49x = 709.92 × 257.22
  4. Step 4: Simplify right side
    473.49x = 182,605.62
  5. Step 5: Solve for x
    x = 182,605.62/473.49
  6. Step 6: Final answer
    x = 385.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.