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Finding the Fourth Proportional to 644,329.44, 889,039.44 and 389,630.88

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Solution

The fourth proportional to 644,329.44, 889,039.44 and 389,630.88 is: 537,608.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,329.44 : 889,039.44 = 389,630.88 : x
  2. Step 2: Convert to fraction form
    644,329.44/889,039.44 = 389,630.88/x
  3. Step 3: Cross multiply
    644,329.44x = 889,039.44 × 389,630.88
  4. Step 4: Simplify right side
    644,329.44x = 346,397,219,361.91
  5. Step 5: Solve for x
    x = 346,397,219,361.91/644,329.44
  6. Step 6: Final answer
    x = 537,608.87

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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.