Home / 289,638.60-434,328.30-131,785.80

Finding the Fourth Proportional to 289,638.60, 434,328.30 and 131,785.80

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Solution

The fourth proportional to 289,638.60, 434,328.30 and 131,785.80 is: 197,619.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,638.60 : 434,328.30 = 131,785.80 : x
  2. Step 2: Convert to fraction form
    289,638.60/434,328.30 = 131,785.80/x
  3. Step 3: Cross multiply
    289,638.60x = 434,328.30 × 131,785.80
  4. Step 4: Simplify right side
    289,638.60x = 57,238,302,478.14
  5. Step 5: Solve for x
    x = 57,238,302,478.14/289,638.60
  6. Step 6: Final answer
    x = 197,619.73

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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.