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Finding the Fourth Proportional to 353.81, 530.39 and 191.30

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Solution

The fourth proportional to 353.81, 530.39 and 191.30 is: 286.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.81 : 530.39 = 191.30 : x
  2. Step 2: Convert to fraction form
    353.81/530.39 = 191.30/x
  3. Step 3: Cross multiply
    353.81x = 530.39 × 191.30
  4. Step 4: Simplify right side
    353.81x = 101,465.41
  5. Step 5: Solve for x
    x = 101,465.41/353.81
  6. Step 6: Final answer
    x = 286.78

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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.