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Finding the Fourth Proportional to 398.19, 596.25 and 260.82

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Solution

The fourth proportional to 398.19, 596.25 and 260.82 is: 390.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.19 : 596.25 = 260.82 : x
  2. Step 2: Convert to fraction form
    398.19/596.25 = 260.82/x
  3. Step 3: Cross multiply
    398.19x = 596.25 × 260.82
  4. Step 4: Simplify right side
    398.19x = 155,513.93
  5. Step 5: Solve for x
    x = 155,513.93/398.19
  6. Step 6: Final answer
    x = 390.55

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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.