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Finding the Fourth Proportional to 1,215,805.72, 1,823,745.49 and 417,075.73

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Solution

The fourth proportional to 1,215,805.72, 1,823,745.49 and 417,075.73 is: 625,626.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,805.72 : 1,823,745.49 = 417,075.73 : x
  2. Step 2: Convert to fraction form
    1,215,805.72/1,823,745.49 = 417,075.73/x
  3. Step 3: Cross multiply
    1,215,805.72x = 1,823,745.49 × 417,075.73
  4. Step 4: Simplify right side
    1,215,805.72x = 760,639,981,575.96
  5. Step 5: Solve for x
    x = 760,639,981,575.96/1,215,805.72
  6. Step 6: Final answer
    x = 625,626.26

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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.