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Finding the Fourth Proportional to 669,390.80, 1,004,863.80 and 403,451.60

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Solution

The fourth proportional to 669,390.80, 1,004,863.80 and 403,451.60 is: 605,646.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,390.80 : 1,004,863.80 = 403,451.60 : x
  2. Step 2: Convert to fraction form
    669,390.80/1,004,863.80 = 403,451.60/x
  3. Step 3: Cross multiply
    669,390.80x = 1,004,863.80 × 403,451.60
  4. Step 4: Simplify right side
    669,390.80x = 405,413,907,892.08
  5. Step 5: Solve for x
    x = 405,413,907,892.08/669,390.80
  6. Step 6: Final answer
    x = 605,646.07

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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.