Home / 484,821.40-726,357.30-428,834.20

Finding the Fourth Proportional to 484,821.40, 726,357.30 and 428,834.20

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Solution

The fourth proportional to 484,821.40, 726,357.30 and 428,834.20 is: 642,477.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,821.40 : 726,357.30 = 428,834.20 : x
  2. Step 2: Convert to fraction form
    484,821.40/726,357.30 = 428,834.20/x
  3. Step 3: Cross multiply
    484,821.40x = 726,357.30 × 428,834.20
  4. Step 4: Simplify right side
    484,821.40x = 311,486,851,659.66
  5. Step 5: Solve for x
    x = 311,486,851,659.66/484,821.40
  6. Step 6: Final answer
    x = 642,477.52

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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.