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Finding the Fourth Proportional to 302.67, 453.99 and 86.24

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Solution

The fourth proportional to 302.67, 453.99 and 86.24 is: 129.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.67 : 453.99 = 86.24 : x
  2. Step 2: Convert to fraction form
    302.67/453.99 = 86.24/x
  3. Step 3: Cross multiply
    302.67x = 453.99 × 86.24
  4. Step 4: Simplify right side
    302.67x = 39,152.10
  5. Step 5: Solve for x
    x = 39,152.10/302.67
  6. Step 6: Final answer
    x = 129.36

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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.