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Finding the Fourth Proportional to 382.80, 528.81 and 296.58

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Solution

The fourth proportional to 382.80, 528.81 and 296.58 is: 409.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.80 : 528.81 = 296.58 : x
  2. Step 2: Convert to fraction form
    382.80/528.81 = 296.58/x
  3. Step 3: Cross multiply
    382.80x = 528.81 × 296.58
  4. Step 4: Simplify right side
    382.80x = 156,834.47
  5. Step 5: Solve for x
    x = 156,834.47/382.80
  6. Step 6: Final answer
    x = 409.70

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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.