Home / 725,417.20-1,089,000.60-405,823.60

Finding the Fourth Proportional to 725,417.20, 1,089,000.60 and 405,823.60

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Solution

The fourth proportional to 725,417.20, 1,089,000.60 and 405,823.60 is: 609,224.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,417.20 : 1,089,000.60 = 405,823.60 : x
  2. Step 2: Convert to fraction form
    725,417.20/1,089,000.60 = 405,823.60/x
  3. Step 3: Cross multiply
    725,417.20x = 1,089,000.60 × 405,823.60
  4. Step 4: Simplify right side
    725,417.20x = 441,942,143,894.16
  5. Step 5: Solve for x
    x = 441,942,143,894.16/725,417.20
  6. Step 6: Final answer
    x = 609,224.79

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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.