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Finding the Fourth Proportional to 534,990.56, 738,295.36 and 320,139.68

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Solution

The fourth proportional to 534,990.56, 738,295.36 and 320,139.68 is: 441,797.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    534,990.56 : 738,295.36 = 320,139.68 : x
  2. Step 2: Convert to fraction form
    534,990.56/738,295.36 = 320,139.68/x
  3. Step 3: Cross multiply
    534,990.56x = 738,295.36 × 320,139.68
  4. Step 4: Simplify right side
    534,990.56x = 236,357,640,295.89
  5. Step 5: Solve for x
    x = 236,357,640,295.89/534,990.56
  6. Step 6: Final answer
    x = 441,797.78

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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.