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Finding the Fourth Proportional to 501,139.50, 691,572.56 and 274,789.86

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Solution

The fourth proportional to 501,139.50, 691,572.56 and 274,789.86 is: 379,210.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,139.50 : 691,572.56 = 274,789.86 : x
  2. Step 2: Convert to fraction form
    501,139.50/691,572.56 = 274,789.86/x
  3. Step 3: Cross multiply
    501,139.50x = 691,572.56 × 274,789.86
  4. Step 4: Simplify right side
    501,139.50x = 190,037,125,568.29
  5. Step 5: Solve for x
    x = 190,037,125,568.29/501,139.50
  6. Step 6: Final answer
    x = 379,210.03

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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.