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Finding the Fourth Proportional to 372,447.92, 513,989.80 and 211,309.76

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Solution

The fourth proportional to 372,447.92, 513,989.80 and 211,309.76 is: 291,614.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,447.92 : 513,989.80 = 211,309.76 : x
  2. Step 2: Convert to fraction form
    372,447.92/513,989.80 = 211,309.76/x
  3. Step 3: Cross multiply
    372,447.92x = 513,989.80 × 211,309.76
  4. Step 4: Simplify right side
    372,447.92x = 108,611,061,280.45
  5. Step 5: Solve for x
    x = 108,611,061,280.45/372,447.92
  6. Step 6: Final answer
    x = 291,614.09

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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.