Home / 812,376.63-1,121,114.77-449,800.52

Finding the Fourth Proportional to 812,376.63, 1,121,114.77 and 449,800.52

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Solution

The fourth proportional to 812,376.63, 1,121,114.77 and 449,800.52 is: 620,744.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,376.63 : 1,121,114.77 = 449,800.52 : x
  2. Step 2: Convert to fraction form
    812,376.63/1,121,114.77 = 449,800.52/x
  3. Step 3: Cross multiply
    812,376.63x = 1,121,114.77 × 449,800.52
  4. Step 4: Simplify right side
    812,376.63x = 504,277,999,795.61
  5. Step 5: Solve for x
    x = 504,277,999,795.61/812,376.63
  6. Step 6: Final answer
    x = 620,744.10

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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.