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Finding the Fourth Proportional to 385.57, 577.68 and 371.35

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Solution

The fourth proportional to 385.57, 577.68 and 371.35 is: 556.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.57 : 577.68 = 371.35 : x
  2. Step 2: Convert to fraction form
    385.57/577.68 = 371.35/x
  3. Step 3: Cross multiply
    385.57x = 577.68 × 371.35
  4. Step 4: Simplify right side
    385.57x = 214,521.47
  5. Step 5: Solve for x
    x = 214,521.47/385.57
  6. Step 6: Final answer
    x = 556.37

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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.