Home / 821,207.40-1,231,278.30-347,764.20

Finding the Fourth Proportional to 821,207.40, 1,231,278.30 and 347,764.20

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Solution

The fourth proportional to 821,207.40, 1,231,278.30 and 347,764.20 is: 521,420.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,207.40 : 1,231,278.30 = 347,764.20 : x
  2. Step 2: Convert to fraction form
    821,207.40/1,231,278.30 = 347,764.20/x
  3. Step 3: Cross multiply
    821,207.40x = 1,231,278.30 × 347,764.20
  4. Step 4: Simplify right side
    821,207.40x = 428,194,512,976.86
  5. Step 5: Solve for x
    x = 428,194,512,976.86/821,207.40
  6. Step 6: Final answer
    x = 521,420.67

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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.