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Finding the Fourth Proportional to 3,619,959.78, 5,421,672.80 and 1,728,029.82

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Solution

The fourth proportional to 3,619,959.78, 5,421,672.80 and 1,728,029.82 is: 2,588,098.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619,959.78 : 5,421,672.80 = 1,728,029.82 : x
  2. Step 2: Convert to fraction form
    3,619,959.78/5,421,672.80 = 1,728,029.82/x
  3. Step 3: Cross multiply
    3,619,959.78x = 5,421,672.80 × 1,728,029.82
  4. Step 4: Simplify right side
    3,619,959.78x = 9,368,812,272,682.90
  5. Step 5: Solve for x
    x = 9,368,812,272,682.90/3,619,959.78
  6. Step 6: Final answer
    x = 2,588,098.44

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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.