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Finding the Fourth Proportional to 385,219.80, 577,891.26 and 118,917.72

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Solution

The fourth proportional to 385,219.80, 577,891.26 and 118,917.72 is: 178,395.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,219.80 : 577,891.26 = 118,917.72 : x
  2. Step 2: Convert to fraction form
    385,219.80/577,891.26 = 118,917.72/x
  3. Step 3: Cross multiply
    385,219.80x = 577,891.26 × 118,917.72
  4. Step 4: Simplify right side
    385,219.80x = 68,721,511,047.13
  5. Step 5: Solve for x
    x = 68,721,511,047.13/385,219.80
  6. Step 6: Final answer
    x = 178,395.58

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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.