Home / 764,438.91-1,054,926.37-420,280.70

Finding the Fourth Proportional to 764,438.91, 1,054,926.37 and 420,280.70

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Solution

The fourth proportional to 764,438.91, 1,054,926.37 and 420,280.70 is: 579,987.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,438.91 : 1,054,926.37 = 420,280.70 : x
  2. Step 2: Convert to fraction form
    764,438.91/1,054,926.37 = 420,280.70/x
  3. Step 3: Cross multiply
    764,438.91x = 1,054,926.37 × 420,280.70
  4. Step 4: Simplify right side
    764,438.91x = 443,365,187,957.43
  5. Step 5: Solve for x
    x = 443,365,187,957.43/764,438.91
  6. Step 6: Final answer
    x = 579,987.73

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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.