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Finding the Fourth Proportional to 1,846,643.10, 2,769,575.85 and 781,719.90

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Solution

The fourth proportional to 1,846,643.10, 2,769,575.85 and 781,719.90 is: 1,172,415.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,846,643.10 : 2,769,575.85 = 781,719.90 : x
  2. Step 2: Convert to fraction form
    1,846,643.10/2,769,575.85 = 781,719.90/x
  3. Step 3: Cross multiply
    1,846,643.10x = 2,769,575.85 × 781,719.90
  4. Step 4: Simplify right side
    1,846,643.10x = 2,165,032,556,504.42
  5. Step 5: Solve for x
    x = 2,165,032,556,504.42/1,846,643.10
  6. Step 6: Final answer
    x = 1,172,415.26

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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.