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Finding the Fourth Proportional to 165.22, 247.81 and 56.98

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Solution

The fourth proportional to 165.22, 247.81 and 56.98 is: 85.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.22 : 247.81 = 56.98 : x
  2. Step 2: Convert to fraction form
    165.22/247.81 = 56.98/x
  3. Step 3: Cross multiply
    165.22x = 247.81 × 56.98
  4. Step 4: Simplify right side
    165.22x = 14,120.21
  5. Step 5: Solve for x
    x = 14,120.21/165.22
  6. Step 6: Final answer
    x = 85.46

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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.