Home / 789,218.12-1,089,119.52-426,642.20

Finding the Fourth Proportional to 789,218.12, 1,089,119.52 and 426,642.20

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Solution

The fourth proportional to 789,218.12, 1,089,119.52 and 426,642.20 is: 588,765.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,218.12 : 1,089,119.52 = 426,642.20 : x
  2. Step 2: Convert to fraction form
    789,218.12/1,089,119.52 = 426,642.20/x
  3. Step 3: Cross multiply
    789,218.12x = 1,089,119.52 × 426,642.20
  4. Step 4: Simplify right side
    789,218.12x = 464,664,348,075.74
  5. Step 5: Solve for x
    x = 464,664,348,075.74/789,218.12
  6. Step 6: Final answer
    x = 588,765.43

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Double scale
Find fourth proportional to 789,219.12, 1,089,120.90 and 426,643.20
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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.