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Finding the Fourth Proportional to 644,120.61, 888,995.78 and 372,346.05

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Solution

The fourth proportional to 644,120.61, 888,995.78 and 372,346.05 is: 513,900.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,120.61 : 888,995.78 = 372,346.05 : x
  2. Step 2: Convert to fraction form
    644,120.61/888,995.78 = 372,346.05/x
  3. Step 3: Cross multiply
    644,120.61x = 888,995.78 × 372,346.05
  4. Step 4: Simplify right side
    644,120.61x = 331,014,067,149.67
  5. Step 5: Solve for x
    x = 331,014,067,149.67/644,120.61
  6. Step 6: Final answer
    x = 513,900.75

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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.