Home / 764,721.90-1,055,343.29-420,584.45

Finding the Fourth Proportional to 764,721.90, 1,055,343.29 and 420,584.45

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Solution

The fourth proportional to 764,721.90, 1,055,343.29 and 420,584.45 is: 580,421.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,721.90 : 1,055,343.29 = 420,584.45 : x
  2. Step 2: Convert to fraction form
    764,721.90/1,055,343.29 = 420,584.45/x
  3. Step 3: Cross multiply
    764,721.90x = 1,055,343.29 × 420,584.45
  4. Step 4: Simplify right side
    764,721.90x = 443,860,969,806.20
  5. Step 5: Solve for x
    x = 443,860,969,806.20/764,721.90
  6. Step 6: Final answer
    x = 580,421.42

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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.