Home / 2,853.45-4,280.85-905.67

Finding the Fourth Proportional to 2,853.45, 4,280.85 and 905.67

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Solution

The fourth proportional to 2,853.45, 4,280.85 and 905.67 is: 1,358.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,853.45 : 4,280.85 = 905.67 : x
  2. Step 2: Convert to fraction form
    2,853.45/4,280.85 = 905.67/x
  3. Step 3: Cross multiply
    2,853.45x = 4,280.85 × 905.67
  4. Step 4: Simplify right side
    2,853.45x = 3,877,037.42
  5. Step 5: Solve for x
    x = 3,877,037.42/2,853.45
  6. Step 6: Final answer
    x = 1,358.72

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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.