Home / 821,258.37-1,231,887.51-309,019.77

Finding the Fourth Proportional to 821,258.37, 1,231,887.51 and 309,019.77

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Solution

The fourth proportional to 821,258.37, 1,231,887.51 and 309,019.77 is: 463,529.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,258.37 : 1,231,887.51 = 309,019.77 : x
  2. Step 2: Convert to fraction form
    821,258.37/1,231,887.51 = 309,019.77/x
  3. Step 3: Cross multiply
    821,258.37x = 1,231,887.51 × 309,019.77
  4. Step 4: Simplify right side
    821,258.37x = 380,677,595,006.07
  5. Step 5: Solve for x
    x = 380,677,595,006.07/821,258.37
  6. Step 6: Final answer
    x = 463,529.64

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Double scale
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Similar ratio
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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.