Home / 1,279,906.80-1,919,341.80-438,025.20

Finding the Fourth Proportional to 1,279,906.80, 1,919,341.80 and 438,025.20

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Solution

The fourth proportional to 1,279,906.80, 1,919,341.80 and 438,025.20 is: 656,860.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,906.80 : 1,919,341.80 = 438,025.20 : x
  2. Step 2: Convert to fraction form
    1,279,906.80/1,919,341.80 = 438,025.20/x
  3. Step 3: Cross multiply
    1,279,906.80x = 1,919,341.80 × 438,025.20
  4. Step 4: Simplify right side
    1,279,906.80x = 840,720,075,813.36
  5. Step 5: Solve for x
    x = 840,720,075,813.36/1,279,906.80
  6. Step 6: Final answer
    x = 656,860.39

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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.