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Finding the Fourth Proportional to 860,936.40, 1,290,943.80 and 361,736.40

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Solution

The fourth proportional to 860,936.40, 1,290,943.80 and 361,736.40 is: 542,410.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,936.40 : 1,290,943.80 = 361,736.40 : x
  2. Step 2: Convert to fraction form
    860,936.40/1,290,943.80 = 361,736.40/x
  3. Step 3: Cross multiply
    860,936.40x = 1,290,943.80 × 361,736.40
  4. Step 4: Simplify right side
    860,936.40x = 466,981,362,814.32
  5. Step 5: Solve for x
    x = 466,981,362,814.32/860,936.40
  6. Step 6: Final answer
    x = 542,410.99

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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.