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Finding the Fourth Proportional to 352,398.21, 528,629.21 and 99,681.24

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Solution

The fourth proportional to 352,398.21, 528,629.21 and 99,681.24 is: 149,530.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,398.21 : 528,629.21 = 99,681.24 : x
  2. Step 2: Convert to fraction form
    352,398.21/528,629.21 = 99,681.24/x
  3. Step 3: Cross multiply
    352,398.21x = 528,629.21 × 99,681.24
  4. Step 4: Simplify right side
    352,398.21x = 52,694,415,153.02
  5. Step 5: Solve for x
    x = 52,694,415,153.02/352,398.21
  6. Step 6: Final answer
    x = 149,530.88

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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.