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Finding the Fourth Proportional to 385.36, 577.91 and 141.83

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Solution

The fourth proportional to 385.36, 577.91 and 141.83 is: 212.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.36 : 577.91 = 141.83 : x
  2. Step 2: Convert to fraction form
    385.36/577.91 = 141.83/x
  3. Step 3: Cross multiply
    385.36x = 577.91 × 141.83
  4. Step 4: Simplify right side
    385.36x = 81,964.61
  5. Step 5: Solve for x
    x = 81,964.61/385.36
  6. Step 6: Final answer
    x = 212.70

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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.