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Finding the Fourth Proportional to 643,762.62, 888,351.03 and 357,282.90

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Solution

The fourth proportional to 643,762.62, 888,351.03 and 357,282.90 is: 493,027.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,762.62 : 888,351.03 = 357,282.90 : x
  2. Step 2: Convert to fraction form
    643,762.62/888,351.03 = 357,282.90/x
  3. Step 3: Cross multiply
    643,762.62x = 888,351.03 × 357,282.90
  4. Step 4: Simplify right side
    643,762.62x = 317,392,632,216.39
  5. Step 5: Solve for x
    x = 317,392,632,216.39/643,762.62
  6. Step 6: Final answer
    x = 493,027.43

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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.