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Finding the Fourth Proportional to 321,398.58, 481,903.41 and 143,872.50

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Solution

The fourth proportional to 321,398.58, 481,903.41 and 143,872.50 is: 215,721.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,398.58 : 481,903.41 = 143,872.50 : x
  2. Step 2: Convert to fraction form
    321,398.58/481,903.41 = 143,872.50/x
  3. Step 3: Cross multiply
    321,398.58x = 481,903.41 × 143,872.50
  4. Step 4: Simplify right side
    321,398.58x = 69,332,648,355.23
  5. Step 5: Solve for x
    x = 69,332,648,355.23/321,398.58
  6. Step 6: Final answer
    x = 215,721.70

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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.