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Finding the Fourth Proportional to 1,679,644.40, 2,525,687.40 and 1,405,929.20

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Solution

The fourth proportional to 1,679,644.40, 2,525,687.40 and 1,405,929.20 is: 2,114,100.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679,644.40 : 2,525,687.40 = 1,405,929.20 : x
  2. Step 2: Convert to fraction form
    1,679,644.40/2,525,687.40 = 1,405,929.20/x
  3. Step 3: Cross multiply
    1,679,644.40x = 2,525,687.40 × 1,405,929.20
  4. Step 4: Simplify right side
    1,679,644.40x = 3,550,937,665,732.08
  5. Step 5: Solve for x
    x = 3,550,937,665,732.08/1,679,644.40
  6. Step 6: Final answer
    x = 2,114,100.86

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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.