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Finding the Fourth Proportional to 621,831.60, 858,127.56 and 353,559.60

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Solution

The fourth proportional to 621,831.60, 858,127.56 and 353,559.60 is: 487,912.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,831.60 : 858,127.56 = 353,559.60 : x
  2. Step 2: Convert to fraction form
    621,831.60/858,127.56 = 353,559.60/x
  3. Step 3: Cross multiply
    621,831.60x = 858,127.56 × 353,559.60
  4. Step 4: Simplify right side
    621,831.60x = 303,399,236,862.58
  5. Step 5: Solve for x
    x = 303,399,236,862.58/621,831.60
  6. Step 6: Final answer
    x = 487,912.22

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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.