Home / 1,188,129.65-1,781,482.77-378,164.21

Finding the Fourth Proportional to 1,188,129.65, 1,781,482.77 and 378,164.21

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Solution

The fourth proportional to 1,188,129.65, 1,781,482.77 and 378,164.21 is: 567,019.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,129.65 : 1,781,482.77 = 378,164.21 : x
  2. Step 2: Convert to fraction form
    1,188,129.65/1,781,482.77 = 378,164.21/x
  3. Step 3: Cross multiply
    1,188,129.65x = 1,781,482.77 × 378,164.21
  4. Step 4: Simplify right side
    1,188,129.65x = 673,693,015,438.25
  5. Step 5: Solve for x
    x = 673,693,015,438.25/1,188,129.65
  6. Step 6: Final answer
    x = 567,019.78

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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.