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Finding the Fourth Proportional to 385.01, 577.65 and 138.23

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Solution

The fourth proportional to 385.01, 577.65 and 138.23 is: 207.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.01 : 577.65 = 138.23 : x
  2. Step 2: Convert to fraction form
    385.01/577.65 = 138.23/x
  3. Step 3: Cross multiply
    385.01x = 577.65 × 138.23
  4. Step 4: Simplify right side
    385.01x = 79,845.67
  5. Step 5: Solve for x
    x = 79,845.67/385.01
  6. Step 6: Final answer
    x = 207.39

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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.