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Finding the Fourth Proportional to 783,274, 1,080,919.20 and 443,765.20

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Solution

The fourth proportional to 783,274, 1,080,919.20 and 443,765.20 is: 612,396.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,274 : 1,080,919.20 = 443,765.20 : x
  2. Step 2: Convert to fraction form
    783,274/1,080,919.20 = 443,765.20/x
  3. Step 3: Cross multiply
    783,274x = 1,080,919.20 × 443,765.20
  4. Step 4: Simplify right side
    783,274x = 479,674,324,971.84
  5. Step 5: Solve for x
    x = 479,674,324,971.84/783,274
  6. Step 6: Final answer
    x = 612,396.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.