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Finding the Fourth Proportional to 385.89, 576.71 and 283.43

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Solution

The fourth proportional to 385.89, 576.71 and 283.43 is: 423.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.89 : 576.71 = 283.43 : x
  2. Step 2: Convert to fraction form
    385.89/576.71 = 283.43/x
  3. Step 3: Cross multiply
    385.89x = 576.71 × 283.43
  4. Step 4: Simplify right side
    385.89x = 163,452.61
  5. Step 5: Solve for x
    x = 163,452.61/385.89
  6. Step 6: Final answer
    x = 423.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.