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Finding the Fourth Proportional to 387,696.33, 581,543.78 and 121,477.23

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Solution

The fourth proportional to 387,696.33, 581,543.78 and 121,477.23 is: 182,215.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,696.33 : 581,543.78 = 121,477.23 : x
  2. Step 2: Convert to fraction form
    387,696.33/581,543.78 = 121,477.23/x
  3. Step 3: Cross multiply
    387,696.33x = 581,543.78 × 121,477.23
  4. Step 4: Simplify right side
    387,696.33x = 70,644,326,910.74
  5. Step 5: Solve for x
    x = 70,644,326,910.74/387,696.33
  6. Step 6: Final answer
    x = 182,215.62

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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.