Home / 821,647.45-1,231,683.86-347,680.81

Finding the Fourth Proportional to 821,647.45, 1,231,683.86 and 347,680.81

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Solution

The fourth proportional to 821,647.45, 1,231,683.86 and 347,680.81 is: 521,188.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,647.45 : 1,231,683.86 = 347,680.81 : x
  2. Step 2: Convert to fraction form
    821,647.45/1,231,683.86 = 347,680.81/x
  3. Step 3: Cross multiply
    821,647.45x = 1,231,683.86 × 347,680.81
  4. Step 4: Simplify right side
    821,647.45x = 428,232,840,370.32
  5. Step 5: Solve for x
    x = 428,232,840,370.32/821,647.45
  6. Step 6: Final answer
    x = 521,188.06

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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.