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Finding the Fourth Proportional to 361.18, 498.96 and 288.28

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Solution

The fourth proportional to 361.18, 498.96 and 288.28 is: 398.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.18 : 498.96 = 288.28 : x
  2. Step 2: Convert to fraction form
    361.18/498.96 = 288.28/x
  3. Step 3: Cross multiply
    361.18x = 498.96 × 288.28
  4. Step 4: Simplify right side
    361.18x = 143,840.81
  5. Step 5: Solve for x
    x = 143,840.81/361.18
  6. Step 6: Final answer
    x = 398.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.