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Finding the Fourth Proportional to 812,478.13, 1,121,206.03 and 449,894.20

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Solution

The fourth proportional to 812,478.13, 1,121,206.03 and 449,894.20 is: 620,846.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,478.13 : 1,121,206.03 = 449,894.20 : x
  2. Step 2: Convert to fraction form
    812,478.13/1,121,206.03 = 449,894.20/x
  3. Step 3: Cross multiply
    812,478.13x = 1,121,206.03 × 449,894.20
  4. Step 4: Simplify right side
    812,478.13x = 504,424,082,046.53
  5. Step 5: Solve for x
    x = 504,424,082,046.53/812,478.13
  6. Step 6: Final answer
    x = 620,846.35

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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.