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Finding the Fourth Proportional to 431,566.70, 647,090.85 and 221,614.70

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Solution

The fourth proportional to 431,566.70, 647,090.85 and 221,614.70 is: 332,288.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,566.70 : 647,090.85 = 221,614.70 : x
  2. Step 2: Convert to fraction form
    431,566.70/647,090.85 = 221,614.70/x
  3. Step 3: Cross multiply
    431,566.70x = 647,090.85 × 221,614.70
  4. Step 4: Simplify right side
    431,566.70x = 143,404,844,595.50
  5. Step 5: Solve for x
    x = 143,404,844,595.50/431,566.70
  6. Step 6: Final answer
    x = 332,288.95

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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.