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Finding the Fourth Proportional to 399.61, 598.98 and 193.74

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Solution

The fourth proportional to 399.61, 598.98 and 193.74 is: 290.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.61 : 598.98 = 193.74 : x
  2. Step 2: Convert to fraction form
    399.61/598.98 = 193.74/x
  3. Step 3: Cross multiply
    399.61x = 598.98 × 193.74
  4. Step 4: Simplify right side
    399.61x = 116,046.39
  5. Step 5: Solve for x
    x = 116,046.39/399.61
  6. Step 6: Final answer
    x = 290.40

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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.