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Finding the Fourth Proportional to 1,243,662.60, 1,855,794.24 and 1,109,621.40

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Solution

The fourth proportional to 1,243,662.60, 1,855,794.24 and 1,109,621.40 is: 1,655,777.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243,662.60 : 1,855,794.24 = 1,109,621.40 : x
  2. Step 2: Convert to fraction form
    1,243,662.60/1,855,794.24 = 1,109,621.40/x
  3. Step 3: Cross multiply
    1,243,662.60x = 1,855,794.24 × 1,109,621.40
  4. Step 4: Simplify right side
    1,243,662.60x = 2,059,229,002,700.74
  5. Step 5: Solve for x
    x = 2,059,229,002,700.74/1,243,662.60
  6. Step 6: Final answer
    x = 1,655,777.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.