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Finding the Fourth Proportional to 509,999.60, 764,999.40 and 454,887.20

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Solution

The fourth proportional to 509,999.60, 764,999.40 and 454,887.20 is: 682,330.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,999.60 : 764,999.40 = 454,887.20 : x
  2. Step 2: Convert to fraction form
    509,999.60/764,999.40 = 454,887.20/x
  3. Step 3: Cross multiply
    509,999.60x = 764,999.40 × 454,887.20
  4. Step 4: Simplify right side
    509,999.60x = 347,988,435,067.68
  5. Step 5: Solve for x
    x = 347,988,435,067.68/509,999.60
  6. Step 6: Final answer
    x = 682,330.80

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Similar ratio
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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.