Home / 431,943.02-647,914.60-221,446.70

Finding the Fourth Proportional to 431,943.02, 647,914.60 and 221,446.70

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Solution

The fourth proportional to 431,943.02, 647,914.60 and 221,446.70 is: 332,170.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,943.02 : 647,914.60 = 221,446.70 : x
  2. Step 2: Convert to fraction form
    431,943.02/647,914.60 = 221,446.70/x
  3. Step 3: Cross multiply
    431,943.02x = 647,914.60 × 221,446.70
  4. Step 4: Simplify right side
    431,943.02x = 143,478,550,051.82
  5. Step 5: Solve for x
    x = 143,478,550,051.82/431,943.02
  6. Step 6: Final answer
    x = 332,170.09

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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.