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Finding the Fourth Proportional to 393,190.48, 542,242.79 and 291,469.33

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Solution

The fourth proportional to 393,190.48, 542,242.79 and 291,469.33 is: 401,960.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,190.48 : 542,242.79 = 291,469.33 : x
  2. Step 2: Convert to fraction form
    393,190.48/542,242.79 = 291,469.33/x
  3. Step 3: Cross multiply
    393,190.48x = 542,242.79 × 291,469.33
  4. Step 4: Simplify right side
    393,190.48x = 158,047,142,698.63
  5. Step 5: Solve for x
    x = 158,047,142,698.63/393,190.48
  6. Step 6: Final answer
    x = 401,960.76

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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.