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Finding the Fourth Proportional to 387,448.25, 581,215.91 and 103,149.89

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Solution

The fourth proportional to 387,448.25, 581,215.91 and 103,149.89 is: 154,736.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,448.25 : 581,215.91 = 103,149.89 : x
  2. Step 2: Convert to fraction form
    387,448.25/581,215.91 = 103,149.89/x
  3. Step 3: Cross multiply
    387,448.25x = 581,215.91 × 103,149.89
  4. Step 4: Simplify right side
    387,448.25x = 59,952,355,940.48
  5. Step 5: Solve for x
    x = 59,952,355,940.48/387,448.25
  6. Step 6: Final answer
    x = 154,736.42

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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.