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Finding the Fourth Proportional to 2,813.95, 4,221.60 and 866.17

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Solution

The fourth proportional to 2,813.95, 4,221.60 and 866.17 is: 1,299.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.95 : 4,221.60 = 866.17 : x
  2. Step 2: Convert to fraction form
    2,813.95/4,221.60 = 866.17/x
  3. Step 3: Cross multiply
    2,813.95x = 4,221.60 × 866.17
  4. Step 4: Simplify right side
    2,813.95x = 3,656,623.27
  5. Step 5: Solve for x
    x = 3,656,623.27/2,813.95
  6. Step 6: Final answer
    x = 1,299.46

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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.