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Finding the Fourth Proportional to 338.62, 507.56 and 278.02

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Solution

The fourth proportional to 338.62, 507.56 and 278.02 is: 416.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.62 : 507.56 = 278.02 : x
  2. Step 2: Convert to fraction form
    338.62/507.56 = 278.02/x
  3. Step 3: Cross multiply
    338.62x = 507.56 × 278.02
  4. Step 4: Simplify right side
    338.62x = 141,111.83
  5. Step 5: Solve for x
    x = 141,111.83/338.62
  6. Step 6: Final answer
    x = 416.73

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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.