Home / 621,440.49-857,705.67-388,975.26

Finding the Fourth Proportional to 621,440.49, 857,705.67 and 388,975.26

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Solution

The fourth proportional to 621,440.49, 857,705.67 and 388,975.26 is: 536,859.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,440.49 : 857,705.67 = 388,975.26 : x
  2. Step 2: Convert to fraction form
    621,440.49/857,705.67 = 388,975.26/x
  3. Step 3: Cross multiply
    621,440.49x = 857,705.67 × 388,975.26
  4. Step 4: Simplify right side
    621,440.49x = 333,626,285,991.72
  5. Step 5: Solve for x
    x = 333,626,285,991.72/621,440.49
  6. Step 6: Final answer
    x = 536,859.59

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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.