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Finding the Fourth Proportional to 339.13, 508.83 and 278.38

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Solution

The fourth proportional to 339.13, 508.83 and 278.38 is: 417.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.13 : 508.83 = 278.38 : x
  2. Step 2: Convert to fraction form
    339.13/508.83 = 278.38/x
  3. Step 3: Cross multiply
    339.13x = 508.83 × 278.38
  4. Step 4: Simplify right side
    339.13x = 141,648.10
  5. Step 5: Solve for x
    x = 141,648.10/339.13
  6. Step 6: Final answer
    x = 417.68

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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.