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Finding the Fourth Proportional to 302.00, 453.20 and 199.40

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Solution

The fourth proportional to 302.00, 453.20 and 199.40 is: 299.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.00 : 453.20 = 199.40 : x
  2. Step 2: Convert to fraction form
    302.00/453.20 = 199.40/x
  3. Step 3: Cross multiply
    302.00x = 453.20 × 199.40
  4. Step 4: Simplify right side
    302.00x = 90,364.82
  5. Step 5: Solve for x
    x = 90,364.82/302.00
  6. Step 6: Final answer
    x = 299.23

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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.