Home / 638,941.40-957,245.70-389,331.80

Finding the Fourth Proportional to 638,941.40, 957,245.70 and 389,331.80

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Solution

The fourth proportional to 638,941.40, 957,245.70 and 389,331.80 is: 583,286.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,941.40 : 957,245.70 = 389,331.80 : x
  2. Step 2: Convert to fraction form
    638,941.40/957,245.70 = 389,331.80/x
  3. Step 3: Cross multiply
    638,941.40x = 957,245.70 × 389,331.80
  4. Step 4: Simplify right side
    638,941.40x = 372,686,191,423.26
  5. Step 5: Solve for x
    x = 372,686,191,423.26/638,941.40
  6. Step 6: Final answer
    x = 583,286.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.