Home / 1,686,288.80-2,529,433.20-978,138.20

Finding the Fourth Proportional to 1,686,288.80, 2,529,433.20 and 978,138.20

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Solution

The fourth proportional to 1,686,288.80, 2,529,433.20 and 978,138.20 is: 1,467,207.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686,288.80 : 2,529,433.20 = 978,138.20 : x
  2. Step 2: Convert to fraction form
    1,686,288.80/2,529,433.20 = 978,138.20/x
  3. Step 3: Cross multiply
    1,686,288.80x = 2,529,433.20 × 978,138.20
  4. Step 4: Simplify right side
    1,686,288.80x = 2,474,135,237,268.24
  5. Step 5: Solve for x
    x = 2,474,135,237,268.24/1,686,288.80
  6. Step 6: Final answer
    x = 1,467,207.30

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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.