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Finding the Fourth Proportional to 474.26, 711.03 and 257.54

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Solution

The fourth proportional to 474.26, 711.03 and 257.54 is: 386.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.26 : 711.03 = 257.54 : x
  2. Step 2: Convert to fraction form
    474.26/711.03 = 257.54/x
  3. Step 3: Cross multiply
    474.26x = 711.03 × 257.54
  4. Step 4: Simplify right side
    474.26x = 183,118.67
  5. Step 5: Solve for x
    x = 183,118.67/474.26
  6. Step 6: Final answer
    x = 386.11

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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.