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Finding the Fourth Proportional to 551.18, 760.48 and 354.96

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Solution

The fourth proportional to 551.18, 760.48 and 354.96 is: 489.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.18 : 760.48 = 354.96 : x
  2. Step 2: Convert to fraction form
    551.18/760.48 = 354.96/x
  3. Step 3: Cross multiply
    551.18x = 760.48 × 354.96
  4. Step 4: Simplify right side
    551.18x = 269,939.98
  5. Step 5: Solve for x
    x = 269,939.98/551.18
  6. Step 6: Final answer
    x = 489.75

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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.