Home / 725,144.59-1,085,387.73-387,340.57

Finding the Fourth Proportional to 725,144.59, 1,085,387.73 and 387,340.57

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Solution

The fourth proportional to 725,144.59, 1,085,387.73 and 387,340.57 is: 579,766.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,144.59 : 1,085,387.73 = 387,340.57 : x
  2. Step 2: Convert to fraction form
    725,144.59/1,085,387.73 = 387,340.57/x
  3. Step 3: Cross multiply
    725,144.59x = 1,085,387.73 × 387,340.57
  4. Step 4: Simplify right side
    725,144.59x = 420,414,702,009.21
  5. Step 5: Solve for x
    x = 420,414,702,009.21/725,144.59
  6. Step 6: Final answer
    x = 579,766.72

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1.5x scale

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.