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Finding the Fourth Proportional to 302.88, 417.92 and 192.36

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Solution

The fourth proportional to 302.88, 417.92 and 192.36 is: 265.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.88 : 417.92 = 192.36 : x
  2. Step 2: Convert to fraction form
    302.88/417.92 = 192.36/x
  3. Step 3: Cross multiply
    302.88x = 417.92 × 192.36
  4. Step 4: Simplify right side
    302.88x = 80,391.09
  5. Step 5: Solve for x
    x = 80,391.09/302.88
  6. Step 6: Final answer
    x = 265.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.