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Finding the Fourth Proportional to 393,532.80, 590,955.30 and 261,000.60

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Solution

The fourth proportional to 393,532.80, 590,955.30 and 261,000.60 is: 391,936.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,532.80 : 590,955.30 = 261,000.60 : x
  2. Step 2: Convert to fraction form
    393,532.80/590,955.30 = 261,000.60/x
  3. Step 3: Cross multiply
    393,532.80x = 590,955.30 × 261,000.60
  4. Step 4: Simplify right side
    393,532.80x = 154,239,687,873.18
  5. Step 5: Solve for x
    x = 154,239,687,873.18/393,532.80
  6. Step 6: Final answer
    x = 391,936.04

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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.