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Finding the Fourth Proportional to 918,874, 1,378,311.04 and 287,837.04

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Solution

The fourth proportional to 918,874, 1,378,311.04 and 287,837.04 is: 431,755.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,874 : 1,378,311.04 = 287,837.04 : x
  2. Step 2: Convert to fraction form
    918,874/1,378,311.04 = 287,837.04/x
  3. Step 3: Cross multiply
    918,874x = 1,378,311.04 × 287,837.04
  4. Step 4: Simplify right side
    918,874x = 396,728,969,952.92
  5. Step 5: Solve for x
    x = 396,728,969,952.92/918,874
  6. Step 6: Final answer
    x = 431,755.57

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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.