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Finding the Fourth Proportional to 1,811,693.70, 2,717,540.55 and 1,214,496.90

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Solution

The fourth proportional to 1,811,693.70, 2,717,540.55 and 1,214,496.90 is: 1,821,745.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811,693.70 : 2,717,540.55 = 1,214,496.90 : x
  2. Step 2: Convert to fraction form
    1,811,693.70/2,717,540.55 = 1,214,496.90/x
  3. Step 3: Cross multiply
    1,811,693.70x = 2,717,540.55 × 1,214,496.90
  4. Step 4: Simplify right side
    1,811,693.70x = 3,300,444,573,599.29
  5. Step 5: Solve for x
    x = 3,300,444,573,599.29/1,811,693.70
  6. Step 6: Final answer
    x = 1,821,745.35

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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.