Home / 728,919.84-1,005,906.59-406,629.68

Finding the Fourth Proportional to 728,919.84, 1,005,906.59 and 406,629.68

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Solution

The fourth proportional to 728,919.84, 1,005,906.59 and 406,629.68 is: 561,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,919.84 : 1,005,906.59 = 406,629.68 : x
  2. Step 2: Convert to fraction form
    728,919.84/1,005,906.59 = 406,629.68/x
  3. Step 3: Cross multiply
    728,919.84x = 1,005,906.59 × 406,629.68
  4. Step 4: Simplify right side
    728,919.84x = 409,031,474,801.59
  5. Step 5: Solve for x
    x = 409,031,474,801.59/728,919.84
  6. Step 6: Final answer
    x = 561,147.40

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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.