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Finding the Fourth Proportional to 431,666.80, 647,500.20 and 221,714.80

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Solution

The fourth proportional to 431,666.80, 647,500.20 and 221,714.80 is: 332,572.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,666.80 : 647,500.20 = 221,714.80 : x
  2. Step 2: Convert to fraction form
    431,666.80/647,500.20 = 221,714.80/x
  3. Step 3: Cross multiply
    431,666.80x = 647,500.20 × 221,714.80
  4. Step 4: Simplify right side
    431,666.80x = 143,560,377,342.96
  5. Step 5: Solve for x
    x = 143,560,377,342.96/431,666.80
  6. Step 6: Final answer
    x = 332,572.20

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1.5x scale

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.