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Finding the Fourth Proportional to 404,629.40, 606,944.10 and 105,085.40

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Solution

The fourth proportional to 404,629.40, 606,944.10 and 105,085.40 is: 157,628.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,629.40 : 606,944.10 = 105,085.40 : x
  2. Step 2: Convert to fraction form
    404,629.40/606,944.10 = 105,085.40/x
  3. Step 3: Cross multiply
    404,629.40x = 606,944.10 × 105,085.40
  4. Step 4: Simplify right side
    404,629.40x = 63,780,963,526.14
  5. Step 5: Solve for x
    x = 63,780,963,526.14/404,629.40
  6. Step 6: Final answer
    x = 157,628.10

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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.