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Finding the Fourth Proportional to 393,709.20, 590,563.80 and 272,986.80

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Solution

The fourth proportional to 393,709.20, 590,563.80 and 272,986.80 is: 409,480.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,709.20 : 590,563.80 = 272,986.80 : x
  2. Step 2: Convert to fraction form
    393,709.20/590,563.80 = 272,986.80/x
  3. Step 3: Cross multiply
    393,709.20x = 590,563.80 × 272,986.80
  4. Step 4: Simplify right side
    393,709.20x = 161,216,121,957.84
  5. Step 5: Solve for x
    x = 161,216,121,957.84/393,709.20
  6. Step 6: Final answer
    x = 409,480.20

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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.