Home / 809,705.40-1,214,903.70-388,764.60

Finding the Fourth Proportional to 809,705.40, 1,214,903.70 and 388,764.60

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Solution

The fourth proportional to 809,705.40, 1,214,903.70 and 388,764.60 is: 583,312.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,705.40 : 1,214,903.70 = 388,764.60 : x
  2. Step 2: Convert to fraction form
    809,705.40/1,214,903.70 = 388,764.60/x
  3. Step 3: Cross multiply
    809,705.40x = 1,214,903.70 × 388,764.60
  4. Step 4: Simplify right side
    809,705.40x = 472,311,550,969.02
  5. Step 5: Solve for x
    x = 472,311,550,969.02/809,705.40
  6. Step 6: Final answer
    x = 583,312.83

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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.