Home / 821,531.96-1,231,196.40-639,382.72

Finding the Fourth Proportional to 821,531.96, 1,231,196.40 and 639,382.72

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Solution

The fourth proportional to 821,531.96, 1,231,196.40 and 639,382.72 is: 958,216.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,531.96 : 1,231,196.40 = 639,382.72 : x
  2. Step 2: Convert to fraction form
    821,531.96/1,231,196.40 = 639,382.72/x
  3. Step 3: Cross multiply
    821,531.96x = 1,231,196.40 × 639,382.72
  4. Step 4: Simplify right side
    821,531.96x = 787,205,703,086.21
  5. Step 5: Solve for x
    x = 787,205,703,086.21/821,531.96
  6. Step 6: Final answer
    x = 958,216.77

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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.