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Finding the Fourth Proportional to 690,174.47, 952,194.24 and 399,627.47

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Solution

The fourth proportional to 690,174.47, 952,194.24 and 399,627.47 is: 551,343.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,174.47 : 952,194.24 = 399,627.47 : x
  2. Step 2: Convert to fraction form
    690,174.47/952,194.24 = 399,627.47/x
  3. Step 3: Cross multiply
    690,174.47x = 952,194.24 × 399,627.47
  4. Step 4: Simplify right side
    690,174.47x = 380,522,977,460.26
  5. Step 5: Solve for x
    x = 380,522,977,460.26/690,174.47
  6. Step 6: Final answer
    x = 551,343.16

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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.