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Finding the Fourth Proportional to 424,151.81, 636,211.09 and 143,669.05

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Solution

The fourth proportional to 424,151.81, 636,211.09 and 143,669.05 is: 215,497.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,151.81 : 636,211.09 = 143,669.05 : x
  2. Step 2: Convert to fraction form
    424,151.81/636,211.09 = 143,669.05/x
  3. Step 3: Cross multiply
    424,151.81x = 636,211.09 × 143,669.05
  4. Step 4: Simplify right side
    424,151.81x = 91,403,839,359.54
  5. Step 5: Solve for x
    x = 91,403,839,359.54/424,151.81
  6. Step 6: Final answer
    x = 215,497.94

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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.