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Finding the Fourth Proportional to 262.58, 393.20 and 164.74

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Solution

The fourth proportional to 262.58, 393.20 and 164.74 is: 246.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.58 : 393.20 = 164.74 : x
  2. Step 2: Convert to fraction form
    262.58/393.20 = 164.74/x
  3. Step 3: Cross multiply
    262.58x = 393.20 × 164.74
  4. Step 4: Simplify right side
    262.58x = 64,775.77
  5. Step 5: Solve for x
    x = 64,775.77/262.58
  6. Step 6: Final answer
    x = 246.69

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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.