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Finding the Fourth Proportional to 509,220.40, 764,646.60 and 404,906.80

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Solution

The fourth proportional to 509,220.40, 764,646.60 and 404,906.80 is: 608,009.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,220.40 : 764,646.60 = 404,906.80 : x
  2. Step 2: Convert to fraction form
    509,220.40/764,646.60 = 404,906.80/x
  3. Step 3: Cross multiply
    509,220.40x = 764,646.60 × 404,906.80
  4. Step 4: Simplify right side
    509,220.40x = 309,610,607,936.88
  5. Step 5: Solve for x
    x = 309,610,607,936.88/509,220.40
  6. Step 6: Final answer
    x = 608,009.04

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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.