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Finding the Fourth Proportional to 394.48, 592.52 and 257.76

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Solution

The fourth proportional to 394.48, 592.52 and 257.76 is: 387.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.48 : 592.52 = 257.76 : x
  2. Step 2: Convert to fraction form
    394.48/592.52 = 257.76/x
  3. Step 3: Cross multiply
    394.48x = 592.52 × 257.76
  4. Step 4: Simplify right side
    394.48x = 152,727.96
  5. Step 5: Solve for x
    x = 152,727.96/394.48
  6. Step 6: Final answer
    x = 387.16

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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.