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Finding the Fourth Proportional to 393,763.20, 590,936.40 and 260,599.20

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Solution

The fourth proportional to 393,763.20, 590,936.40 and 260,599.20 is: 391,091.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,763.20 : 590,936.40 = 260,599.20 : x
  2. Step 2: Convert to fraction form
    393,763.20/590,936.40 = 260,599.20/x
  3. Step 3: Cross multiply
    393,763.20x = 590,936.40 × 260,599.20
  4. Step 4: Simplify right side
    393,763.20x = 153,997,553,090.88
  5. Step 5: Solve for x
    x = 153,997,553,090.88/393,763.20
  6. Step 6: Final answer
    x = 391,091.79

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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.