Home / 764,447.96-1,054,938.87-420,289.76

Finding the Fourth Proportional to 764,447.96, 1,054,938.87 and 420,289.76

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Solution

The fourth proportional to 764,447.96, 1,054,938.87 and 420,289.76 is: 580,000.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,447.96 : 1,054,938.87 = 420,289.76 : x
  2. Step 2: Convert to fraction form
    764,447.96/1,054,938.87 = 420,289.76/x
  3. Step 3: Cross multiply
    764,447.96x = 1,054,938.87 × 420,289.76
  4. Step 4: Simplify right side
    764,447.96x = 443,380,007,124.32
  5. Step 5: Solve for x
    x = 443,380,007,124.32/764,447.96
  6. Step 6: Final answer
    x = 580,000.25

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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.