Home / 207,514.40-311,563.20-128,782.40

Finding the Fourth Proportional to 207,514.40, 311,563.20 and 128,782.40

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Solution

The fourth proportional to 207,514.40, 311,563.20 and 128,782.40 is: 193,354.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,514.40 : 311,563.20 = 128,782.40 : x
  2. Step 2: Convert to fraction form
    207,514.40/311,563.20 = 128,782.40/x
  3. Step 3: Cross multiply
    207,514.40x = 311,563.20 × 128,782.40
  4. Step 4: Simplify right side
    207,514.40x = 40,123,856,647.68
  5. Step 5: Solve for x
    x = 40,123,856,647.68/207,514.40
  6. Step 6: Final answer
    x = 193,354.57

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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.