Home / 821,534.70-1,231,200.54-639,385.47

Finding the Fourth Proportional to 821,534.70, 1,231,200.54 and 639,385.47

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Solution

The fourth proportional to 821,534.70, 1,231,200.54 and 639,385.47 is: 958,220.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,534.70 : 1,231,200.54 = 639,385.47 : x
  2. Step 2: Convert to fraction form
    821,534.70/1,231,200.54 = 639,385.47/x
  3. Step 3: Cross multiply
    821,534.70x = 1,231,200.54 × 639,385.47
  4. Step 4: Simplify right side
    821,534.70x = 787,211,735,932.15
  5. Step 5: Solve for x
    x = 787,211,735,932.15/821,534.70
  6. Step 6: Final answer
    x = 958,220.92

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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.