Home / 764,722.90-1,055,344.67-420,585.45

Finding the Fourth Proportional to 764,722.90, 1,055,344.67 and 420,585.45

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Solution

The fourth proportional to 764,722.90, 1,055,344.67 and 420,585.45 is: 580,422.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,722.90 : 1,055,344.67 = 420,585.45 : x
  2. Step 2: Convert to fraction form
    764,722.90/1,055,344.67 = 420,585.45/x
  3. Step 3: Cross multiply
    764,722.90x = 1,055,344.67 × 420,585.45
  4. Step 4: Simplify right side
    764,722.90x = 443,862,612,937.05
  5. Step 5: Solve for x
    x = 443,862,612,937.05/764,722.90
  6. Step 6: Final answer
    x = 580,422.81

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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.