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Finding the Fourth Proportional to 368.31, 552.47 and 111.81

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Solution

The fourth proportional to 368.31, 552.47 and 111.81 is: 167.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.31 : 552.47 = 111.81 : x
  2. Step 2: Convert to fraction form
    368.31/552.47 = 111.81/x
  3. Step 3: Cross multiply
    368.31x = 552.47 × 111.81
  4. Step 4: Simplify right side
    368.31x = 61,771.67
  5. Step 5: Solve for x
    x = 61,771.67/368.31
  6. Step 6: Final answer
    x = 167.72

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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.