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Finding the Fourth Proportional to 1,216,892.90, 1,821,840.15 and 1,181,900.90

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Solution

The fourth proportional to 1,216,892.90, 1,821,840.15 and 1,181,900.90 is: 1,769,452.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,892.90 : 1,821,840.15 = 1,181,900.90 : x
  2. Step 2: Convert to fraction form
    1,216,892.90/1,821,840.15 = 1,181,900.90/x
  3. Step 3: Cross multiply
    1,216,892.90x = 1,821,840.15 × 1,181,900.90
  4. Step 4: Simplify right side
    1,216,892.90x = 2,153,234,512,941.13
  5. Step 5: Solve for x
    x = 2,153,234,512,941.13/1,216,892.90
  6. Step 6: Final answer
    x = 1,769,452.77

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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.