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Finding the Fourth Proportional to 1,961,478.03, 2,706,872.06 and 1,078,464.50

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Solution

The fourth proportional to 1,961,478.03, 2,706,872.06 and 1,078,464.50 is: 1,488,298.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961,478.03 : 2,706,872.06 = 1,078,464.50 : x
  2. Step 2: Convert to fraction form
    1,961,478.03/2,706,872.06 = 1,078,464.50/x
  3. Step 3: Cross multiply
    1,961,478.03x = 2,706,872.06 × 1,078,464.50
  4. Step 4: Simplify right side
    1,961,478.03x = 2,919,265,420,777.05
  5. Step 5: Solve for x
    x = 2,919,265,420,777.05/1,961,478.03
  6. Step 6: Final answer
    x = 1,488,298.81

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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.