Home / 318,205.46-439,218.41-209,393.70

Finding the Fourth Proportional to 318,205.46, 439,218.41 and 209,393.70

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Solution

The fourth proportional to 318,205.46, 439,218.41 and 209,393.70 is: 289,025.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,205.46 : 439,218.41 = 209,393.70 : x
  2. Step 2: Convert to fraction form
    318,205.46/439,218.41 = 209,393.70/x
  3. Step 3: Cross multiply
    318,205.46x = 439,218.41 × 209,393.70
  4. Step 4: Simplify right side
    318,205.46x = 91,969,566,931.05
  5. Step 5: Solve for x
    x = 91,969,566,931.05/318,205.46
  6. Step 6: Final answer
    x = 289,025.74

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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.