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Finding the Fourth Proportional to 1,990,342.86, 2,981,138.22 and 1,644,870.93

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Solution

The fourth proportional to 1,990,342.86, 2,981,138.22 and 1,644,870.93 is: 2,463,689.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,342.86 : 2,981,138.22 = 1,644,870.93 : x
  2. Step 2: Convert to fraction form
    1,990,342.86/2,981,138.22 = 1,644,870.93/x
  3. Step 3: Cross multiply
    1,990,342.86x = 2,981,138.22 × 1,644,870.93
  4. Step 4: Simplify right side
    1,990,342.86x = 4,903,587,596,389.94
  5. Step 5: Solve for x
    x = 4,903,587,596,389.94/1,990,342.86
  6. Step 6: Final answer
    x = 2,463,689.90

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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.