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Finding the Fourth Proportional to 292.80, 403.20 and 268.16

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Solution

The fourth proportional to 292.80, 403.20 and 268.16 is: 369.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.80 : 403.20 = 268.16 : x
  2. Step 2: Convert to fraction form
    292.80/403.20 = 268.16/x
  3. Step 3: Cross multiply
    292.80x = 403.20 × 268.16
  4. Step 4: Simplify right side
    292.80x = 108,122.11
  5. Step 5: Solve for x
    x = 108,122.11/292.80
  6. Step 6: Final answer
    x = 369.27

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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.