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Finding the Fourth Proportional to 621,806.10, 858,092.37 and 353,534.10

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Solution

The fourth proportional to 621,806.10, 858,092.37 and 353,534.10 is: 487,877.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,806.10 : 858,092.37 = 353,534.10 : x
  2. Step 2: Convert to fraction form
    621,806.10/858,092.37 = 353,534.10/x
  3. Step 3: Cross multiply
    621,806.10x = 858,092.37 × 353,534.10
  4. Step 4: Simplify right side
    621,806.10x = 303,364,913,744.82
  5. Step 5: Solve for x
    x = 303,364,913,744.82/621,806.10
  6. Step 6: Final answer
    x = 487,877.03

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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.