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Finding the Fourth Proportional to 393,491.20, 589,348.76 and 275,688.32

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Solution

The fourth proportional to 393,491.20, 589,348.76 and 275,688.32 is: 412,910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,491.20 : 589,348.76 = 275,688.32 : x
  2. Step 2: Convert to fraction form
    393,491.20/589,348.76 = 275,688.32/x
  3. Step 3: Cross multiply
    393,491.20x = 589,348.76 × 275,688.32
  4. Step 4: Simplify right side
    393,491.20x = 162,476,569,538.48
  5. Step 5: Solve for x
    x = 162,476,569,538.48/393,491.20
  6. Step 6: Final answer
    x = 412,910.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.