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Finding the Fourth Proportional to 385.13, 576.90 and 302.70

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Solution

The fourth proportional to 385.13, 576.90 and 302.70 is: 453.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.13 : 576.90 = 302.70 : x
  2. Step 2: Convert to fraction form
    385.13/576.90 = 302.70/x
  3. Step 3: Cross multiply
    385.13x = 576.90 × 302.70
  4. Step 4: Simplify right side
    385.13x = 174,627.63
  5. Step 5: Solve for x
    x = 174,627.63/385.13
  6. Step 6: Final answer
    x = 453.43

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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.