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Finding the Fourth Proportional to 365,818.47, 548,902.62 and 129,272.55

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Solution

The fourth proportional to 365,818.47, 548,902.62 and 129,272.55 is: 193,970.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,818.47 : 548,902.62 = 129,272.55 : x
  2. Step 2: Convert to fraction form
    365,818.47/548,902.62 = 129,272.55/x
  3. Step 3: Cross multiply
    365,818.47x = 548,902.62 × 129,272.55
  4. Step 4: Simplify right side
    365,818.47x = 70,958,041,389.08
  5. Step 5: Solve for x
    x = 70,958,041,389.08/365,818.47
  6. Step 6: Final answer
    x = 193,970.64

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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.