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Finding the Fourth Proportional to 385.02, 577.34 and 231.12

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Solution

The fourth proportional to 385.02, 577.34 and 231.12 is: 346.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.02 : 577.34 = 231.12 : x
  2. Step 2: Convert to fraction form
    385.02/577.34 = 231.12/x
  3. Step 3: Cross multiply
    385.02x = 577.34 × 231.12
  4. Step 4: Simplify right side
    385.02x = 133,434.82
  5. Step 5: Solve for x
    x = 133,434.82/385.02
  6. Step 6: Final answer
    x = 346.57

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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.