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Finding the Fourth Proportional to 302.23, 453.24 and 128.98

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Solution

The fourth proportional to 302.23, 453.24 and 128.98 is: 193.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.23 : 453.24 = 128.98 : x
  2. Step 2: Convert to fraction form
    302.23/453.24 = 128.98/x
  3. Step 3: Cross multiply
    302.23x = 453.24 × 128.98
  4. Step 4: Simplify right side
    302.23x = 58,459.38
  5. Step 5: Solve for x
    x = 58,459.38/302.23
  6. Step 6: Final answer
    x = 193.43

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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.