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Finding the Fourth Proportional to 656,399.76, 905,831.66 and 354,593.76

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Solution

The fourth proportional to 656,399.76, 905,831.66 and 354,593.76 is: 489,339.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,399.76 : 905,831.66 = 354,593.76 : x
  2. Step 2: Convert to fraction form
    656,399.76/905,831.66 = 354,593.76/x
  3. Step 3: Cross multiply
    656,399.76x = 905,831.66 × 354,593.76
  4. Step 4: Simplify right side
    656,399.76x = 321,202,254,246.44
  5. Step 5: Solve for x
    x = 321,202,254,246.44/656,399.76
  6. Step 6: Final answer
    x = 489,339.38

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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.