Home / 765,150.57-1,055,915.87-420,991.02

Finding the Fourth Proportional to 765,150.57, 1,055,915.87 and 420,991.02

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Solution

The fourth proportional to 765,150.57, 1,055,915.87 and 420,991.02 is: 580,972.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,150.57 : 1,055,915.87 = 420,991.02 : x
  2. Step 2: Convert to fraction form
    765,150.57/1,055,915.87 = 420,991.02/x
  3. Step 3: Cross multiply
    765,150.57x = 1,055,915.87 × 420,991.02
  4. Step 4: Simplify right side
    765,150.57x = 444,531,097,040.53
  5. Step 5: Solve for x
    x = 444,531,097,040.53/765,150.57
  6. Step 6: Final answer
    x = 580,972.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.