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Finding the Fourth Proportional to 1,989,789.80, 2,978,334.30 and 1,569,885.80

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Solution

The fourth proportional to 1,989,789.80, 2,978,334.30 and 1,569,885.80 is: 2,349,818.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989,789.80 : 2,978,334.30 = 1,569,885.80 : x
  2. Step 2: Convert to fraction form
    1,989,789.80/2,978,334.30 = 1,569,885.80/x
  3. Step 3: Cross multiply
    1,989,789.80x = 2,978,334.30 × 1,569,885.80
  4. Step 4: Simplify right side
    1,989,789.80x = 4,675,644,725,222.94
  5. Step 5: Solve for x
    x = 4,675,644,725,222.94/1,989,789.80
  6. Step 6: Final answer
    x = 2,349,818.42

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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.