Home / 725,921.40-1,089,270.90-305,239.80

Finding the Fourth Proportional to 725,921.40, 1,089,270.90 and 305,239.80

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Solution

The fourth proportional to 725,921.40, 1,089,270.90 and 305,239.80 is: 458,023.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,921.40 : 1,089,270.90 = 305,239.80 : x
  2. Step 2: Convert to fraction form
    725,921.40/1,089,270.90 = 305,239.80/x
  3. Step 3: Cross multiply
    725,921.40x = 1,089,270.90 × 305,239.80
  4. Step 4: Simplify right side
    725,921.40x = 332,488,831,661.82
  5. Step 5: Solve for x
    x = 332,488,831,661.82/725,921.40
  6. Step 6: Final answer
    x = 458,023.18

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1.5x scale

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.