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Finding the Fourth Proportional to 398.69, 600.56 and 368.61

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Solution

The fourth proportional to 398.69, 600.56 and 368.61 is: 555.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.69 : 600.56 = 368.61 : x
  2. Step 2: Convert to fraction form
    398.69/600.56 = 368.61/x
  3. Step 3: Cross multiply
    398.69x = 600.56 × 368.61
  4. Step 4: Simplify right side
    398.69x = 221,370.58
  5. Step 5: Solve for x
    x = 221,370.58/398.69
  6. Step 6: Final answer
    x = 555.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.