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Finding the Fourth Proportional to 719,939.64, 993,578.22 and 397,684.92

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Solution

The fourth proportional to 719,939.64, 993,578.22 and 397,684.92 is: 548,839.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,939.64 : 993,578.22 = 397,684.92 : x
  2. Step 2: Convert to fraction form
    719,939.64/993,578.22 = 397,684.92/x
  3. Step 3: Cross multiply
    719,939.64x = 993,578.22 × 397,684.92
  4. Step 4: Simplify right side
    719,939.64x = 395,131,074,934.44
  5. Step 5: Solve for x
    x = 395,131,074,934.44/719,939.64
  6. Step 6: Final answer
    x = 548,839.17

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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.