Home / 821,527.95-1,231,190.40-639,378.72

Finding the Fourth Proportional to 821,527.95, 1,231,190.40 and 639,378.72

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Solution

The fourth proportional to 821,527.95, 1,231,190.40 and 639,378.72 is: 958,210.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,527.95 : 1,231,190.40 = 639,378.72 : x
  2. Step 2: Convert to fraction form
    821,527.95/1,231,190.40 = 639,378.72/x
  3. Step 3: Cross multiply
    821,527.95x = 1,231,190.40 × 639,378.72
  4. Step 4: Simplify right side
    821,527.95x = 787,196,942,028.29
  5. Step 5: Solve for x
    x = 787,196,942,028.29/821,527.95
  6. Step 6: Final answer
    x = 958,210.79

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Double scale
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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.