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Finding the Fourth Proportional to 385,042.22, 577,351.92 and 118,728.80

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Solution

The fourth proportional to 385,042.22, 577,351.92 and 118,728.80 is: 178,028.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,042.22 : 577,351.92 = 118,728.80 : x
  2. Step 2: Convert to fraction form
    385,042.22/577,351.92 = 118,728.80/x
  3. Step 3: Cross multiply
    385,042.22x = 577,351.92 × 118,728.80
  4. Step 4: Simplify right side
    385,042.22x = 68,548,300,639.30
  5. Step 5: Solve for x
    x = 68,548,300,639.30/385,042.22
  6. Step 6: Final answer
    x = 178,028.01

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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.