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Finding the Fourth Proportional to 385.34, 577.82 and 141.70

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Solution

The fourth proportional to 385.34, 577.82 and 141.70 is: 212.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.34 : 577.82 = 141.70 : x
  2. Step 2: Convert to fraction form
    385.34/577.82 = 141.70/x
  3. Step 3: Cross multiply
    385.34x = 577.82 × 141.70
  4. Step 4: Simplify right side
    385.34x = 81,877.09
  5. Step 5: Solve for x
    x = 81,877.09/385.34
  6. Step 6: Final answer
    x = 212.48

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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.