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Finding the Fourth Proportional to 302.22, 453.51 and 128.86

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Solution

The fourth proportional to 302.22, 453.51 and 128.86 is: 193.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.22 : 453.51 = 128.86 : x
  2. Step 2: Convert to fraction form
    302.22/453.51 = 128.86/x
  3. Step 3: Cross multiply
    302.22x = 453.51 × 128.86
  4. Step 4: Simplify right side
    302.22x = 58,438.16
  5. Step 5: Solve for x
    x = 58,438.16/302.22
  6. Step 6: Final answer
    x = 193.36

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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.