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Finding the Fourth Proportional to 338.68, 507.81 and 156.10

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Solution

The fourth proportional to 338.68, 507.81 and 156.10 is: 234.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.68 : 507.81 = 156.10 : x
  2. Step 2: Convert to fraction form
    338.68/507.81 = 156.10/x
  3. Step 3: Cross multiply
    338.68x = 507.81 × 156.10
  4. Step 4: Simplify right side
    338.68x = 79,269.14
  5. Step 5: Solve for x
    x = 79,269.14/338.68
  6. Step 6: Final answer
    x = 234.05

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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.