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Finding the Fourth Proportional to 338.79, 507.84 and 165.34

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Solution

The fourth proportional to 338.79, 507.84 and 165.34 is: 247.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.79 : 507.84 = 165.34 : x
  2. Step 2: Convert to fraction form
    338.79/507.84 = 165.34/x
  3. Step 3: Cross multiply
    338.79x = 507.84 × 165.34
  4. Step 4: Simplify right side
    338.79x = 83,966.27
  5. Step 5: Solve for x
    x = 83,966.27/338.79
  6. Step 6: Final answer
    x = 247.84

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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.