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Finding the Fourth Proportional to 1,990,379.88, 2,983,801.98 and 775,675.14

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Solution

The fourth proportional to 1,990,379.88, 2,983,801.98 and 775,675.14 is: 1,162,823.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,379.88 : 2,983,801.98 = 775,675.14 : x
  2. Step 2: Convert to fraction form
    1,990,379.88/2,983,801.98 = 775,675.14/x
  3. Step 3: Cross multiply
    1,990,379.88x = 2,983,801.98 × 775,675.14
  4. Step 4: Simplify right side
    1,990,379.88x = 2,314,461,018,568.78
  5. Step 5: Solve for x
    x = 2,314,461,018,568.78/1,990,379.88
  6. Step 6: Final answer
    x = 1,162,823.76

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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.