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Finding the Fourth Proportional to 296.55, 409.20 and 165.55

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Solution

The fourth proportional to 296.55, 409.20 and 165.55 is: 228.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.55 : 409.20 = 165.55 : x
  2. Step 2: Convert to fraction form
    296.55/409.20 = 165.55/x
  3. Step 3: Cross multiply
    296.55x = 409.20 × 165.55
  4. Step 4: Simplify right side
    296.55x = 67,743.06
  5. Step 5: Solve for x
    x = 67,743.06/296.55
  6. Step 6: Final answer
    x = 228.44

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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.