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Finding the Fourth Proportional to 296.79, 445.20 and 142.68

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Solution

The fourth proportional to 296.79, 445.20 and 142.68 is: 214.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.79 : 445.20 = 142.68 : x
  2. Step 2: Convert to fraction form
    296.79/445.20 = 142.68/x
  3. Step 3: Cross multiply
    296.79x = 445.20 × 142.68
  4. Step 4: Simplify right side
    296.79x = 63,521.14
  5. Step 5: Solve for x
    x = 63,521.14/296.79
  6. Step 6: Final answer
    x = 214.03

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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.