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Finding the Fourth Proportional to 501,235.28, 691,640.96 and 286,389.26

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Solution

The fourth proportional to 501,235.28, 691,640.96 and 286,389.26 is: 395,180.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,235.28 : 691,640.96 = 286,389.26 : x
  2. Step 2: Convert to fraction form
    501,235.28/691,640.96 = 286,389.26/x
  3. Step 3: Cross multiply
    501,235.28x = 691,640.96 × 286,389.26
  4. Step 4: Simplify right side
    501,235.28x = 198,078,542,720.09
  5. Step 5: Solve for x
    x = 198,078,542,720.09/501,235.28
  6. Step 6: Final answer
    x = 395,180.77

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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.