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Finding the Fourth Proportional to 424,247.40, 636,327.36 and 143,757.36

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Solution

The fourth proportional to 424,247.40, 636,327.36 and 143,757.36 is: 215,621.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,247.40 : 636,327.36 = 143,757.36 : x
  2. Step 2: Convert to fraction form
    424,247.40/636,327.36 = 143,757.36/x
  3. Step 3: Cross multiply
    424,247.40x = 636,327.36 × 143,757.36
  4. Step 4: Simplify right side
    424,247.40x = 91,476,741,369.37
  5. Step 5: Solve for x
    x = 91,476,741,369.37/424,247.40
  6. Step 6: Final answer
    x = 215,621.22

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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.