Home / 484,822.40-726,358.80-428,835.20

Finding the Fourth Proportional to 484,822.40, 726,358.80 and 428,835.20

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Solution

The fourth proportional to 484,822.40, 726,358.80 and 428,835.20 is: 642,479.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,822.40 : 726,358.80 = 428,835.20 : x
  2. Step 2: Convert to fraction form
    484,822.40/726,358.80 = 428,835.20/x
  3. Step 3: Cross multiply
    484,822.40x = 726,358.80 × 428,835.20
  4. Step 4: Simplify right side
    484,822.40x = 311,488,221,269.76
  5. Step 5: Solve for x
    x = 311,488,221,269.76/484,822.40
  6. Step 6: Final answer
    x = 642,479.02

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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.