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Finding the Fourth Proportional to 385.47, 577.99 and 229.45

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Solution

The fourth proportional to 385.47, 577.99 and 229.45 is: 344.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.47 : 577.99 = 229.45 : x
  2. Step 2: Convert to fraction form
    385.47/577.99 = 229.45/x
  3. Step 3: Cross multiply
    385.47x = 577.99 × 229.45
  4. Step 4: Simplify right side
    385.47x = 132,619.81
  5. Step 5: Solve for x
    x = 132,619.81/385.47
  6. Step 6: Final answer
    x = 344.05

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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.