Home / 686,685.72-1,029,831.75-206,959.98

Finding the Fourth Proportional to 686,685.72, 1,029,831.75 and 206,959.98

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Solution

The fourth proportional to 686,685.72, 1,029,831.75 and 206,959.98 is: 310,380.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,685.72 : 1,029,831.75 = 206,959.98 : x
  2. Step 2: Convert to fraction form
    686,685.72/1,029,831.75 = 206,959.98/x
  3. Step 3: Cross multiply
    686,685.72x = 1,029,831.75 × 206,959.98
  4. Step 4: Simplify right side
    686,685.72x = 213,133,958,383.37
  5. Step 5: Solve for x
    x = 213,133,958,383.37/686,685.72
  6. Step 6: Final answer
    x = 310,380.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.