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Finding the Fourth Proportional to 368.18, 551.78 and 173.16

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Solution

The fourth proportional to 368.18, 551.78 and 173.16 is: 259.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.18 : 551.78 = 173.16 : x
  2. Step 2: Convert to fraction form
    368.18/551.78 = 173.16/x
  3. Step 3: Cross multiply
    368.18x = 551.78 × 173.16
  4. Step 4: Simplify right side
    368.18x = 95,545.36
  5. Step 5: Solve for x
    x = 95,545.36/368.18
  6. Step 6: Final answer
    x = 259.51

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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.