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Finding the Fourth Proportional to 643,553.37, 888,102.23 and 357,114.69

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Solution

The fourth proportional to 643,553.37, 888,102.23 and 357,114.69 is: 492,817.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,553.37 : 888,102.23 = 357,114.69 : x
  2. Step 2: Convert to fraction form
    643,553.37/888,102.23 = 357,114.69/x
  3. Step 3: Cross multiply
    643,553.37x = 888,102.23 × 357,114.69
  4. Step 4: Simplify right side
    643,553.37x = 317,154,350,769.19
  5. Step 5: Solve for x
    x = 317,154,350,769.19/643,553.37
  6. Step 6: Final answer
    x = 492,817.48

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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.