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Finding the Fourth Proportional to 398.52, 598.86 and 277.56

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Solution

The fourth proportional to 398.52, 598.86 and 277.56 is: 417.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.52 : 598.86 = 277.56 : x
  2. Step 2: Convert to fraction form
    398.52/598.86 = 277.56/x
  3. Step 3: Cross multiply
    398.52x = 598.86 × 277.56
  4. Step 4: Simplify right side
    398.52x = 166,219.58
  5. Step 5: Solve for x
    x = 166,219.58/398.52
  6. Step 6: Final answer
    x = 417.09

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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.