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Finding the Fourth Proportional to 819,361.17, 1,229,097.12 and 392,990.49

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Solution

The fourth proportional to 819,361.17, 1,229,097.12 and 392,990.49 is: 589,512.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,361.17 : 1,229,097.12 = 392,990.49 : x
  2. Step 2: Convert to fraction form
    819,361.17/1,229,097.12 = 392,990.49/x
  3. Step 3: Cross multiply
    819,361.17x = 1,229,097.12 × 392,990.49
  4. Step 4: Simplify right side
    819,361.17x = 483,023,479,446.39
  5. Step 5: Solve for x
    x = 483,023,479,446.39/819,361.17
  6. Step 6: Final answer
    x = 589,512.29

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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.