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Finding the Fourth Proportional to 354.23, 530.66 and 199.69

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Solution

The fourth proportional to 354.23, 530.66 and 199.69 is: 299.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.23 : 530.66 = 199.69 : x
  2. Step 2: Convert to fraction form
    354.23/530.66 = 199.69/x
  3. Step 3: Cross multiply
    354.23x = 530.66 × 199.69
  4. Step 4: Simplify right side
    354.23x = 105,967.53
  5. Step 5: Solve for x
    x = 105,967.53/354.23
  6. Step 6: Final answer
    x = 299.15

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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.