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Finding the Fourth Proportional to 302.55, 453.60 and 129.08

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Solution

The fourth proportional to 302.55, 453.60 and 129.08 is: 193.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.55 : 453.60 = 129.08 : x
  2. Step 2: Convert to fraction form
    302.55/453.60 = 129.08/x
  3. Step 3: Cross multiply
    302.55x = 453.60 × 129.08
  4. Step 4: Simplify right side
    302.55x = 58,548.42
  5. Step 5: Solve for x
    x = 58,548.42/302.55
  6. Step 6: Final answer
    x = 193.52

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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.