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Finding the Fourth Proportional to 385,287.44, 577,768.55 and 115,453.86

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Solution

The fourth proportional to 385,287.44, 577,768.55 and 115,453.86 is: 173,132.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,287.44 : 577,768.55 = 115,453.86 : x
  2. Step 2: Convert to fraction form
    385,287.44/577,768.55 = 115,453.86/x
  3. Step 3: Cross multiply
    385,287.44x = 577,768.55 × 115,453.86
  4. Step 4: Simplify right side
    385,287.44x = 66,705,606,540.20
  5. Step 5: Solve for x
    x = 66,705,606,540.20/385,287.44
  6. Step 6: Final answer
    x = 173,132.06

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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.