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Finding the Fourth Proportional to 621,615.36, 857,825.28 and 353,343.36

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Solution

The fourth proportional to 621,615.36, 857,825.28 and 353,343.36 is: 487,611.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,615.36 : 857,825.28 = 353,343.36 : x
  2. Step 2: Convert to fraction form
    621,615.36/857,825.28 = 353,343.36/x
  3. Step 3: Cross multiply
    621,615.36x = 857,825.28 × 353,343.36
  4. Step 4: Simplify right side
    621,615.36x = 303,106,866,728.14
  5. Step 5: Solve for x
    x = 303,106,866,728.14/621,615.36
  6. Step 6: Final answer
    x = 487,611.61

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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.