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Finding the Fourth Proportional to 424,530.39, 636,665.97 and 120,949.34

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Solution

The fourth proportional to 424,530.39, 636,665.97 and 120,949.34 is: 181,387.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,530.39 : 636,665.97 = 120,949.34 : x
  2. Step 2: Convert to fraction form
    424,530.39/636,665.97 = 120,949.34/x
  3. Step 3: Cross multiply
    424,530.39x = 636,665.97 × 120,949.34
  4. Step 4: Simplify right side
    424,530.39x = 77,004,325,631.94
  5. Step 5: Solve for x
    x = 77,004,325,631.94/424,530.39
  6. Step 6: Final answer
    x = 181,387.07

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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.