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Finding the Fourth Proportional to 372,189.87, 513,739.11 and 211,151.94

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Solution

The fourth proportional to 372,189.87, 513,739.11 and 211,151.94 is: 291,456.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,189.87 : 513,739.11 = 211,151.94 : x
  2. Step 2: Convert to fraction form
    372,189.87/513,739.11 = 211,151.94/x
  3. Step 3: Cross multiply
    372,189.87x = 513,739.11 × 211,151.94
  4. Step 4: Simplify right side
    372,189.87x = 108,477,008,674.61
  5. Step 5: Solve for x
    x = 108,477,008,674.61/372,189.87
  6. Step 6: Final answer
    x = 291,456.11

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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.