Home / 431,629.80-647,444.70-392,922.60

Finding the Fourth Proportional to 431,629.80, 647,444.70 and 392,922.60

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Solution

The fourth proportional to 431,629.80, 647,444.70 and 392,922.60 is: 589,383.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,629.80 : 647,444.70 = 392,922.60 : x
  2. Step 2: Convert to fraction form
    431,629.80/647,444.70 = 392,922.60/x
  3. Step 3: Cross multiply
    431,629.80x = 647,444.70 × 392,922.60
  4. Step 4: Simplify right side
    431,629.80x = 254,395,654,880.22
  5. Step 5: Solve for x
    x = 254,395,654,880.22/431,629.80
  6. Step 6: Final answer
    x = 589,383.90

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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.