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Finding the Fourth Proportional to 633,440.36, 874,234.67 and 388,381.77

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Solution

The fourth proportional to 633,440.36, 874,234.67 and 388,381.77 is: 536,020.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,440.36 : 874,234.67 = 388,381.77 : x
  2. Step 2: Convert to fraction form
    633,440.36/874,234.67 = 388,381.77/x
  3. Step 3: Cross multiply
    633,440.36x = 874,234.67 × 388,381.77
  4. Step 4: Simplify right side
    633,440.36x = 339,536,806,588.06
  5. Step 5: Solve for x
    x = 339,536,806,588.06/633,440.36
  6. Step 6: Final answer
    x = 536,020.17

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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.