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Finding the Fourth Proportional to 428.13, 589.82 and 296.91

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Solution

The fourth proportional to 428.13, 589.82 and 296.91 is: 409.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.13 : 589.82 = 296.91 : x
  2. Step 2: Convert to fraction form
    428.13/589.82 = 296.91/x
  3. Step 3: Cross multiply
    428.13x = 589.82 × 296.91
  4. Step 4: Simplify right side
    428.13x = 175,121.97
  5. Step 5: Solve for x
    x = 175,121.97/428.13
  6. Step 6: Final answer
    x = 409.04

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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.