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Finding the Fourth Proportional to 385.08, 573.89 and 372.78

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Solution

The fourth proportional to 385.08, 573.89 and 372.78 is: 555.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.08 : 573.89 = 372.78 : x
  2. Step 2: Convert to fraction form
    385.08/573.89 = 372.78/x
  3. Step 3: Cross multiply
    385.08x = 573.89 × 372.78
  4. Step 4: Simplify right side
    385.08x = 213,934.71
  5. Step 5: Solve for x
    x = 213,934.71/385.08
  6. Step 6: Final answer
    x = 555.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.