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Finding the Fourth Proportional to 424,379.55, 636,551.10 and 143,896.80

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Solution

The fourth proportional to 424,379.55, 636,551.10 and 143,896.80 is: 215,839.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,379.55 : 636,551.10 = 143,896.80 : x
  2. Step 2: Convert to fraction form
    424,379.55/636,551.10 = 143,896.80/x
  3. Step 3: Cross multiply
    424,379.55x = 636,551.10 × 143,896.80
  4. Step 4: Simplify right side
    424,379.55x = 91,597,666,326.48
  5. Step 5: Solve for x
    x = 91,597,666,326.48/424,379.55
  6. Step 6: Final answer
    x = 215,839.02

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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.