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Finding the Fourth Proportional to 1,296,964.63, 1,789,841.37 and 813,550.15

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Solution

The fourth proportional to 1,296,964.63, 1,789,841.37 and 813,550.15 is: 1,122,718.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296,964.63 : 1,789,841.37 = 813,550.15 : x
  2. Step 2: Convert to fraction form
    1,296,964.63/1,789,841.37 = 813,550.15/x
  3. Step 3: Cross multiply
    1,296,964.63x = 1,789,841.37 × 813,550.15
  4. Step 4: Simplify right side
    1,296,964.63x = 1,456,125,715,039.71
  5. Step 5: Solve for x
    x = 1,456,125,715,039.71/1,296,964.63
  6. Step 6: Final answer
    x = 1,122,718.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.