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Finding the Fourth Proportional to 354.64, 532.20 and 162.40

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Solution

The fourth proportional to 354.64, 532.20 and 162.40 is: 243.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.64 : 532.20 = 162.40 : x
  2. Step 2: Convert to fraction form
    354.64/532.20 = 162.40/x
  3. Step 3: Cross multiply
    354.64x = 532.20 × 162.40
  4. Step 4: Simplify right side
    354.64x = 86,429.28
  5. Step 5: Solve for x
    x = 86,429.28/354.64
  6. Step 6: Final answer
    x = 243.71

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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.