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Finding the Fourth Proportional to 728,270.80, 1,089,781.80 and 492,074.80

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Solution

The fourth proportional to 728,270.80, 1,089,781.80 and 492,074.80 is: 736,338.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,270.80 : 1,089,781.80 = 492,074.80 : x
  2. Step 2: Convert to fraction form
    728,270.80/1,089,781.80 = 492,074.80/x
  3. Step 3: Cross multiply
    728,270.80x = 1,089,781.80 × 492,074.80
  4. Step 4: Simplify right side
    728,270.80x = 536,254,161,278.64
  5. Step 5: Solve for x
    x = 536,254,161,278.64/728,270.80
  6. Step 6: Final answer
    x = 736,338.96

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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.