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Finding the Fourth Proportional to 431,445.80, 647,552.70 and 253,730.60

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Solution

The fourth proportional to 431,445.80, 647,552.70 and 253,730.60 is: 380,821.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,445.80 : 647,552.70 = 253,730.60 : x
  2. Step 2: Convert to fraction form
    431,445.80/647,552.70 = 253,730.60/x
  3. Step 3: Cross multiply
    431,445.80x = 647,552.70 × 253,730.60
  4. Step 4: Simplify right side
    431,445.80x = 164,303,935,102.62
  5. Step 5: Solve for x
    x = 164,303,935,102.62/431,445.80
  6. Step 6: Final answer
    x = 380,821.73

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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.