Home / 1,279,172.11-1,918,731.81-426,305.69

Finding the Fourth Proportional to 1,279,172.11, 1,918,731.81 and 426,305.69

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Solution

The fourth proportional to 1,279,172.11, 1,918,731.81 and 426,305.69 is: 639,449.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,172.11 : 1,918,731.81 = 426,305.69 : x
  2. Step 2: Convert to fraction form
    1,279,172.11/1,918,731.81 = 426,305.69/x
  3. Step 3: Cross multiply
    1,279,172.11x = 1,918,731.81 × 426,305.69
  4. Step 4: Simplify right side
    1,279,172.11x = 817,966,288,187.00
  5. Step 5: Solve for x
    x = 817,966,288,187.00/1,279,172.11
  6. Step 6: Final answer
    x = 639,449.75

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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.