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Finding the Fourth Proportional to 500,912.76, 691,259.74 and 274,572.84

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Solution

The fourth proportional to 500,912.76, 691,259.74 and 274,572.84 is: 378,910.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,912.76 : 691,259.74 = 274,572.84 : x
  2. Step 2: Convert to fraction form
    500,912.76/691,259.74 = 274,572.84/x
  3. Step 3: Cross multiply
    500,912.76x = 691,259.74 × 274,572.84
  4. Step 4: Simplify right side
    500,912.76x = 189,801,149,989.46
  5. Step 5: Solve for x
    x = 189,801,149,989.46/500,912.76
  6. Step 6: Final answer
    x = 378,910.59

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1.5x scale

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.