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Finding the Fourth Proportional to 557.31, 768.98 and 336.18

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Solution

The fourth proportional to 557.31, 768.98 and 336.18 is: 463.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.31 : 768.98 = 336.18 : x
  2. Step 2: Convert to fraction form
    557.31/768.98 = 336.18/x
  3. Step 3: Cross multiply
    557.31x = 768.98 × 336.18
  4. Step 4: Simplify right side
    557.31x = 258,514.02
  5. Step 5: Solve for x
    x = 258,514.02/557.31
  6. Step 6: Final answer
    x = 463.86

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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.