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Finding the Fourth Proportional to 664,831.78, 923,661.71 and 656,860.17

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Solution

The fourth proportional to 664,831.78, 923,661.71 and 656,860.17 is: 912,586.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,831.78 : 923,661.71 = 656,860.17 : x
  2. Step 2: Convert to fraction form
    664,831.78/923,661.71 = 656,860.17/x
  3. Step 3: Cross multiply
    664,831.78x = 923,661.71 × 656,860.17
  4. Step 4: Simplify right side
    664,831.78x = 606,716,581,592.63
  5. Step 5: Solve for x
    x = 606,716,581,592.63/664,831.78
  6. Step 6: Final answer
    x = 912,586.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.