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Finding the Fourth Proportional to 643,593.78, 888,165.54 and 357,140.52

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Solution

The fourth proportional to 643,593.78, 888,165.54 and 357,140.52 is: 492,857.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,593.78 : 888,165.54 = 357,140.52 : x
  2. Step 2: Convert to fraction form
    643,593.78/888,165.54 = 357,140.52/x
  3. Step 3: Cross multiply
    643,593.78x = 888,165.54 × 357,140.52
  4. Step 4: Simplify right side
    643,593.78x = 317,199,902,801.68
  5. Step 5: Solve for x
    x = 317,199,902,801.68/643,593.78
  6. Step 6: Final answer
    x = 492,857.32

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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.