Home / 764,443.29-1,054,932.40-420,285.07

Finding the Fourth Proportional to 764,443.29, 1,054,932.40 and 420,285.07

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Solution

The fourth proportional to 764,443.29, 1,054,932.40 and 420,285.07 is: 579,993.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,443.29 : 1,054,932.40 = 420,285.07 : x
  2. Step 2: Convert to fraction form
    764,443.29/1,054,932.40 = 420,285.07/x
  3. Step 3: Cross multiply
    764,443.29x = 1,054,932.40 × 420,285.07
  4. Step 4: Simplify right side
    764,443.29x = 443,372,337,579.27
  5. Step 5: Solve for x
    x = 443,372,337,579.27/764,443.29
  6. Step 6: Final answer
    x = 579,993.76

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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.