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Finding the Fourth Proportional to 561,707.94, 775,162.11 and 319,986.93

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Solution

The fourth proportional to 561,707.94, 775,162.11 and 319,986.93 is: 441,584.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,707.94 : 775,162.11 = 319,986.93 : x
  2. Step 2: Convert to fraction form
    561,707.94/775,162.11 = 319,986.93/x
  3. Step 3: Cross multiply
    561,707.94x = 775,162.11 × 319,986.93
  4. Step 4: Simplify right side
    561,707.94x = 248,041,743,831.22
  5. Step 5: Solve for x
    x = 248,041,743,831.22/561,707.94
  6. Step 6: Final answer
    x = 441,584.90

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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.