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Finding the Fourth Proportional to 338.36, 507.16 and 143.30

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Solution

The fourth proportional to 338.36, 507.16 and 143.30 is: 214.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.36 : 507.16 = 143.30 : x
  2. Step 2: Convert to fraction form
    338.36/507.16 = 143.30/x
  3. Step 3: Cross multiply
    338.36x = 507.16 × 143.30
  4. Step 4: Simplify right side
    338.36x = 72,676.03
  5. Step 5: Solve for x
    x = 72,676.03/338.36
  6. Step 6: Final answer
    x = 214.79

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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.