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Finding the Fourth Proportional to 382.16, 572.28 and 290.48

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Solution

The fourth proportional to 382.16, 572.28 and 290.48 is: 434.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.16 : 572.28 = 290.48 : x
  2. Step 2: Convert to fraction form
    382.16/572.28 = 290.48/x
  3. Step 3: Cross multiply
    382.16x = 572.28 × 290.48
  4. Step 4: Simplify right side
    382.16x = 166,235.89
  5. Step 5: Solve for x
    x = 166,235.89/382.16
  6. Step 6: Final answer
    x = 434.99

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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.