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Finding the Fourth Proportional to 398.76, 598.06 and 110.13

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Solution

The fourth proportional to 398.76, 598.06 and 110.13 is: 165.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.76 : 598.06 = 110.13 : x
  2. Step 2: Convert to fraction form
    398.76/598.06 = 110.13/x
  3. Step 3: Cross multiply
    398.76x = 598.06 × 110.13
  4. Step 4: Simplify right side
    398.76x = 65,864.35
  5. Step 5: Solve for x
    x = 65,864.35/398.76
  6. Step 6: Final answer
    x = 165.17

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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.