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Finding the Fourth Proportional to 354, 531.80 and 272.58

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Solution

The fourth proportional to 354, 531.80 and 272.58 is: 409.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    354 : 531.80 = 272.58 : x
  2. Step 2: Convert to fraction form
    354/531.80 = 272.58/x
  3. Step 3: Cross multiply
    354x = 531.80 × 272.58
  4. Step 4: Simplify right side
    354x = 144,958.04
  5. Step 5: Solve for x
    x = 144,958.04/354
  6. Step 6: Final answer
    x = 409.49

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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.