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Finding the Fourth Proportional to 644,221.56, 888,960.78 and 376,105.08

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Solution

The fourth proportional to 644,221.56, 888,960.78 and 376,105.08 is: 518,987.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,221.56 : 888,960.78 = 376,105.08 : x
  2. Step 2: Convert to fraction form
    644,221.56/888,960.78 = 376,105.08/x
  3. Step 3: Cross multiply
    644,221.56x = 888,960.78 × 376,105.08
  4. Step 4: Simplify right side
    644,221.56x = 334,342,665,278.76
  5. Step 5: Solve for x
    x = 334,342,665,278.76/644,221.56
  6. Step 6: Final answer
    x = 518,987.08

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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.