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Finding the Fourth Proportional to 1,890,657.86, 2,609,138.94 and 1,031,218.16

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Solution

The fourth proportional to 1,890,657.86, 2,609,138.94 and 1,031,218.16 is: 1,423,098.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890,657.86 : 2,609,138.94 = 1,031,218.16 : x
  2. Step 2: Convert to fraction form
    1,890,657.86/2,609,138.94 = 1,031,218.16/x
  3. Step 3: Cross multiply
    1,890,657.86x = 2,609,138.94 × 1,031,218.16
  4. Step 4: Simplify right side
    1,890,657.86x = 2,690,591,456,891.15
  5. Step 5: Solve for x
    x = 2,690,591,456,891.15/1,890,657.86
  6. Step 6: Final answer
    x = 1,423,098.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.