Home / 442,905.40-664,455.30-143,399.80

Finding the Fourth Proportional to 442,905.40, 664,455.30 and 143,399.80

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Solution

The fourth proportional to 442,905.40, 664,455.30 and 143,399.80 is: 215,131.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,905.40 : 664,455.30 = 143,399.80 : x
  2. Step 2: Convert to fraction form
    442,905.40/664,455.30 = 143,399.80/x
  3. Step 3: Cross multiply
    442,905.40x = 664,455.30 × 143,399.80
  4. Step 4: Simplify right side
    442,905.40x = 95,282,757,128.94
  5. Step 5: Solve for x
    x = 95,282,757,128.94/442,905.40
  6. Step 6: Final answer
    x = 215,131.17

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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.