Home / 764,489.52-1,055,015.80-420,339.84

Finding the Fourth Proportional to 764,489.52, 1,055,015.80 and 420,339.84

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Solution

The fourth proportional to 764,489.52, 1,055,015.80 and 420,339.84 is: 580,080.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,489.52 : 1,055,015.80 = 420,339.84 : x
  2. Step 2: Convert to fraction form
    764,489.52/1,055,015.80 = 420,339.84/x
  3. Step 3: Cross multiply
    764,489.52x = 1,055,015.80 × 420,339.84
  4. Step 4: Simplify right side
    764,489.52x = 443,465,172,569.47
  5. Step 5: Solve for x
    x = 443,465,172,569.47/764,489.52
  6. Step 6: Final answer
    x = 580,080.12

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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.