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Finding the Fourth Proportional to 338.75, 507.93 and 156.05

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Solution

The fourth proportional to 338.75, 507.93 and 156.05 is: 233.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.75 : 507.93 = 156.05 : x
  2. Step 2: Convert to fraction form
    338.75/507.93 = 156.05/x
  3. Step 3: Cross multiply
    338.75x = 507.93 × 156.05
  4. Step 4: Simplify right side
    338.75x = 79,262.48
  5. Step 5: Solve for x
    x = 79,262.48/338.75
  6. Step 6: Final answer
    x = 233.99

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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.