Home / 1,389,722.30-2,084,942.84-813,831.89

Finding the Fourth Proportional to 1,389,722.30, 2,084,942.84 and 813,831.89

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Solution

The fourth proportional to 1,389,722.30, 2,084,942.84 and 813,831.89 is: 1,220,958.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,722.30 : 2,084,942.84 = 813,831.89 : x
  2. Step 2: Convert to fraction form
    1,389,722.30/2,084,942.84 = 813,831.89/x
  3. Step 3: Cross multiply
    1,389,722.30x = 2,084,942.84 × 813,831.89
  4. Step 4: Simplify right side
    1,389,722.30x = 1,696,792,957,525.29
  5. Step 5: Solve for x
    x = 1,696,792,957,525.29/1,389,722.30
  6. Step 6: Final answer
    x = 1,220,958.29

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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.