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Finding the Fourth Proportional to 387,736.41, 535,484.17 and 345,469.80

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Solution

The fourth proportional to 387,736.41, 535,484.17 and 345,469.80 is: 477,111.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,736.41 : 535,484.17 = 345,469.80 : x
  2. Step 2: Convert to fraction form
    387,736.41/535,484.17 = 345,469.80/x
  3. Step 3: Cross multiply
    387,736.41x = 535,484.17 × 345,469.80
  4. Step 4: Simplify right side
    387,736.41x = 184,993,606,435.65
  5. Step 5: Solve for x
    x = 184,993,606,435.65/387,736.41
  6. Step 6: Final answer
    x = 477,111.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.