Home / 789,216.12-1,089,116.76-426,640.20

Finding the Fourth Proportional to 789,216.12, 1,089,116.76 and 426,640.20

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Solution

The fourth proportional to 789,216.12, 1,089,116.76 and 426,640.20 is: 588,762.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,216.12 : 1,089,116.76 = 426,640.20 : x
  2. Step 2: Convert to fraction form
    789,216.12/1,089,116.76 = 426,640.20/x
  3. Step 3: Cross multiply
    789,216.12x = 1,089,116.76 × 426,640.20
  4. Step 4: Simplify right side
    789,216.12x = 464,660,992,309.75
  5. Step 5: Solve for x
    x = 464,660,992,309.75/789,216.12
  6. Step 6: Final answer
    x = 588,762.67

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.