Home / 764,434.80-1,054,920.70-420,276.59

Finding the Fourth Proportional to 764,434.80, 1,054,920.70 and 420,276.59

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Solution

The fourth proportional to 764,434.80, 1,054,920.70 and 420,276.59 is: 579,982.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,434.80 : 1,054,920.70 = 420,276.59 : x
  2. Step 2: Convert to fraction form
    764,434.80/1,054,920.70 = 420,276.59/x
  3. Step 3: Cross multiply
    764,434.80x = 1,054,920.70 × 420,276.59
  4. Step 4: Simplify right side
    764,434.80x = 443,358,474,516.41
  5. Step 5: Solve for x
    x = 443,358,474,516.41/764,434.80
  6. Step 6: Final answer
    x = 579,982.07

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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.