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Finding the Fourth Proportional to 431,230.20, 648,011.70 and 379,908.60

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Solution

The fourth proportional to 431,230.20, 648,011.70 and 379,908.60 is: 570,890.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,230.20 : 648,011.70 = 379,908.60 : x
  2. Step 2: Convert to fraction form
    431,230.20/648,011.70 = 379,908.60/x
  3. Step 3: Cross multiply
    431,230.20x = 648,011.70 × 379,908.60
  4. Step 4: Simplify right side
    431,230.20x = 246,185,217,730.62
  5. Step 5: Solve for x
    x = 246,185,217,730.62/431,230.20
  6. Step 6: Final answer
    x = 570,890.48

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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.