Home / 687,140.81-948,147.38-392,786.33

Finding the Fourth Proportional to 687,140.81, 948,147.38 and 392,786.33

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Solution

The fourth proportional to 687,140.81, 948,147.38 and 392,786.33 is: 541,984.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,140.81 : 948,147.38 = 392,786.33 : x
  2. Step 2: Convert to fraction form
    687,140.81/948,147.38 = 392,786.33/x
  3. Step 3: Cross multiply
    687,140.81x = 948,147.38 × 392,786.33
  4. Step 4: Simplify right side
    687,140.81x = 372,419,324,457.60
  5. Step 5: Solve for x
    x = 372,419,324,457.60/687,140.81
  6. Step 6: Final answer
    x = 541,984.00

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1.5x scale

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.