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Finding the Fourth Proportional to 302.01, 453.18 and 128.66

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Solution

The fourth proportional to 302.01, 453.18 and 128.66 is: 193.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.01 : 453.18 = 128.66 : x
  2. Step 2: Convert to fraction form
    302.01/453.18 = 128.66/x
  3. Step 3: Cross multiply
    302.01x = 453.18 × 128.66
  4. Step 4: Simplify right side
    302.01x = 58,304.85
  5. Step 5: Solve for x
    x = 58,304.85/302.01
  6. Step 6: Final answer
    x = 193.06

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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.