Home / 1,245,999.70-1,868,999.55-820,846.90

Finding the Fourth Proportional to 1,245,999.70, 1,868,999.55 and 820,846.90

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Solution

The fourth proportional to 1,245,999.70, 1,868,999.55 and 820,846.90 is: 1,231,270.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245,999.70 : 1,868,999.55 = 820,846.90 : x
  2. Step 2: Convert to fraction form
    1,245,999.70/1,868,999.55 = 820,846.90/x
  3. Step 3: Cross multiply
    1,245,999.70x = 1,868,999.55 × 820,846.90
  4. Step 4: Simplify right side
    1,245,999.70x = 1,534,162,486,718.90
  5. Step 5: Solve for x
    x = 1,534,162,486,718.90/1,245,999.70
  6. Step 6: Final answer
    x = 1,231,270.35

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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.