Home / 1,686,643.80-2,529,965.70-978,493.20

Finding the Fourth Proportional to 1,686,643.80, 2,529,965.70 and 978,493.20

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Solution

The fourth proportional to 1,686,643.80, 2,529,965.70 and 978,493.20 is: 1,467,739.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,686,643.80 : 2,529,965.70 = 978,493.20 : x
  2. Step 2: Convert to fraction form
    1,686,643.80/2,529,965.70 = 978,493.20/x
  3. Step 3: Cross multiply
    1,686,643.80x = 2,529,965.70 × 978,493.20
  4. Step 4: Simplify right side
    1,686,643.80x = 2,475,554,233,683.24
  5. Step 5: Solve for x
    x = 2,475,554,233,683.24/1,686,643.80
  6. Step 6: Final answer
    x = 1,467,739.80

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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.