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Finding the Fourth Proportional to 303.36, 455 and 86.92

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Solution

The fourth proportional to 303.36, 455 and 86.92 is: 130.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.36 : 455 = 86.92 : x
  2. Step 2: Convert to fraction form
    303.36/455 = 86.92/x
  3. Step 3: Cross multiply
    303.36x = 455 × 86.92
  4. Step 4: Simplify right side
    303.36x = 39,548.60
  5. Step 5: Solve for x
    x = 39,548.60/303.36
  6. Step 6: Final answer
    x = 130.37

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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.