Home / 728,640.82-1,005,525.27-401,946.45

Finding the Fourth Proportional to 728,640.82, 1,005,525.27 and 401,946.45

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Solution

The fourth proportional to 728,640.82, 1,005,525.27 and 401,946.45 is: 554,686.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,640.82 : 1,005,525.27 = 401,946.45 : x
  2. Step 2: Convert to fraction form
    728,640.82/1,005,525.27 = 401,946.45/x
  3. Step 3: Cross multiply
    728,640.82x = 1,005,525.27 × 401,946.45
  4. Step 4: Simplify right side
    728,640.82x = 404,167,313,416.68
  5. Step 5: Solve for x
    x = 404,167,313,416.68/728,640.82
  6. Step 6: Final answer
    x = 554,686.62

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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.