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Finding the Fourth Proportional to 694,086.35, 957,888 and 388,191.20

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Solution

The fourth proportional to 694,086.35, 957,888 and 388,191.20 is: 535,731.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,086.35 : 957,888 = 388,191.20 : x
  2. Step 2: Convert to fraction form
    694,086.35/957,888 = 388,191.20/x
  3. Step 3: Cross multiply
    694,086.35x = 957,888 × 388,191.20
  4. Step 4: Simplify right side
    694,086.35x = 371,843,687,396.16
  5. Step 5: Solve for x
    x = 371,843,687,396.16/694,086.35
  6. Step 6: Final answer
    x = 535,731.17

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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.