Home / 431,559.20-647,338.80-221,607.20

Finding the Fourth Proportional to 431,559.20, 647,338.80 and 221,607.20

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Solution

The fourth proportional to 431,559.20, 647,338.80 and 221,607.20 is: 332,410.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,559.20 : 647,338.80 = 221,607.20 : x
  2. Step 2: Convert to fraction form
    431,559.20/647,338.80 = 221,607.20/x
  3. Step 3: Cross multiply
    431,559.20x = 647,338.80 × 221,607.20
  4. Step 4: Simplify right side
    431,559.20x = 143,454,938,919.36
  5. Step 5: Solve for x
    x = 143,454,938,919.36/431,559.20
  6. Step 6: Final answer
    x = 332,410.80

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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.