Home / 780,619.72-1,171,195.42-420,825.34

Finding the Fourth Proportional to 780,619.72, 1,171,195.42 and 420,825.34

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Solution

The fourth proportional to 780,619.72, 1,171,195.42 and 420,825.34 is: 631,381.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,619.72 : 1,171,195.42 = 420,825.34 : x
  2. Step 2: Convert to fraction form
    780,619.72/1,171,195.42 = 420,825.34/x
  3. Step 3: Cross multiply
    780,619.72x = 1,171,195.42 × 420,825.34
  4. Step 4: Simplify right side
    780,619.72x = 492,868,714,614.60
  5. Step 5: Solve for x
    x = 492,868,714,614.60/780,619.72
  6. Step 6: Final answer
    x = 631,381.32

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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.