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Finding the Fourth Proportional to 1,333,986.47, 1,999,858.41 and 1,080,638.68

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Solution

The fourth proportional to 1,333,986.47, 1,999,858.41 and 1,080,638.68 is: 1,620,049.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333,986.47 : 1,999,858.41 = 1,080,638.68 : x
  2. Step 2: Convert to fraction form
    1,333,986.47/1,999,858.41 = 1,080,638.68/x
  3. Step 3: Cross multiply
    1,333,986.47x = 1,999,858.41 × 1,080,638.68
  4. Step 4: Simplify right side
    1,333,986.47x = 2,161,124,357,167.17
  5. Step 5: Solve for x
    x = 2,161,124,357,167.17/1,333,986.47
  6. Step 6: Final answer
    x = 1,620,049.69

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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.