Home / 1,389,756.25-2,084,993.75-813,865.86

Finding the Fourth Proportional to 1,389,756.25, 2,084,993.75 and 813,865.86

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Solution

The fourth proportional to 1,389,756.25, 2,084,993.75 and 813,865.86 is: 1,221,009.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,756.25 : 2,084,993.75 = 813,865.86 : x
  2. Step 2: Convert to fraction form
    1,389,756.25/2,084,993.75 = 813,865.86/x
  3. Step 3: Cross multiply
    1,389,756.25x = 2,084,993.75 × 813,865.86
  4. Step 4: Simplify right side
    1,389,756.25x = 1,696,905,233,473.04
  5. Step 5: Solve for x
    x = 1,696,905,233,473.04/1,389,756.25
  6. Step 6: Final answer
    x = 1,221,009.25

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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.