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Finding the Fourth Proportional to 840,381, 1,260,582.42 and 279,415.50

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Solution

The fourth proportional to 840,381, 1,260,582.42 and 279,415.50 is: 419,126.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,381 : 1,260,582.42 = 279,415.50 : x
  2. Step 2: Convert to fraction form
    840,381/1,260,582.42 = 279,415.50/x
  3. Step 3: Cross multiply
    840,381x = 1,260,582.42 × 279,415.50
  4. Step 4: Simplify right side
    840,381x = 352,226,267,175.51
  5. Step 5: Solve for x
    x = 352,226,267,175.51/840,381
  6. Step 6: Final answer
    x = 419,126.88

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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.