Home / 712,218.06-982,863.79-389,958.14

Finding the Fourth Proportional to 712,218.06, 982,863.79 and 389,958.14

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Solution

The fourth proportional to 712,218.06, 982,863.79 and 389,958.14 is: 538,143.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,218.06 : 982,863.79 = 389,958.14 : x
  2. Step 2: Convert to fraction form
    712,218.06/982,863.79 = 389,958.14/x
  3. Step 3: Cross multiply
    712,218.06x = 982,863.79 × 389,958.14
  4. Step 4: Simplify right side
    712,218.06x = 383,275,736,904.02
  5. Step 5: Solve for x
    x = 383,275,736,904.02/712,218.06
  6. Step 6: Final answer
    x = 538,143.81

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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.