Home / 812,487.42-1,121,218.85-449,903.49

Finding the Fourth Proportional to 812,487.42, 1,121,218.85 and 449,903.49

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Solution

The fourth proportional to 812,487.42, 1,121,218.85 and 449,903.49 is: 620,859.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,487.42 : 1,121,218.85 = 449,903.49 : x
  2. Step 2: Convert to fraction form
    812,487.42/1,121,218.85 = 449,903.49/x
  3. Step 3: Cross multiply
    812,487.42x = 1,121,218.85 × 449,903.49
  4. Step 4: Simplify right side
    812,487.42x = 504,440,271,419.27
  5. Step 5: Solve for x
    x = 504,440,271,419.27/812,487.42
  6. Step 6: Final answer
    x = 620,859.18

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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.