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Finding the Fourth Proportional to 296.64, 409.44 and 209.56

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Solution

The fourth proportional to 296.64, 409.44 and 209.56 is: 289.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.64 : 409.44 = 209.56 : x
  2. Step 2: Convert to fraction form
    296.64/409.44 = 209.56/x
  3. Step 3: Cross multiply
    296.64x = 409.44 × 209.56
  4. Step 4: Simplify right side
    296.64x = 85,802.25
  5. Step 5: Solve for x
    x = 85,802.25/296.64
  6. Step 6: Final answer
    x = 289.25

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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.