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Finding the Fourth Proportional to 372,978.50, 514,703.79 and 203,213.82

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Solution

The fourth proportional to 372,978.50, 514,703.79 and 203,213.82 is: 280,431.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,978.50 : 514,703.79 = 203,213.82 : x
  2. Step 2: Convert to fraction form
    372,978.50/514,703.79 = 203,213.82/x
  3. Step 3: Cross multiply
    372,978.50x = 514,703.79 × 203,213.82
  4. Step 4: Simplify right side
    372,978.50x = 104,594,923,334.38
  5. Step 5: Solve for x
    x = 104,594,923,334.38/372,978.50
  6. Step 6: Final answer
    x = 280,431.51

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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.