Home / 810,431.20-1,214,903.70-311,419.36

Finding the Fourth Proportional to 810,431.20, 1,214,903.70 and 311,419.36

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Solution

The fourth proportional to 810,431.20, 1,214,903.70 and 311,419.36 is: 466,843.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,431.20 : 1,214,903.70 = 311,419.36 : x
  2. Step 2: Convert to fraction form
    810,431.20/1,214,903.70 = 311,419.36/x
  3. Step 3: Cross multiply
    810,431.20x = 1,214,903.70 × 311,419.36
  4. Step 4: Simplify right side
    810,431.20x = 378,344,532,715.63
  5. Step 5: Solve for x
    x = 378,344,532,715.63/810,431.20
  6. Step 6: Final answer
    x = 466,843.49

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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.