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Finding the Fourth Proportional to 1,815.14, 2,722.78 and 645.27

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Solution

The fourth proportional to 1,815.14, 2,722.78 and 645.27 is: 967.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.14 : 2,722.78 = 645.27 : x
  2. Step 2: Convert to fraction form
    1,815.14/2,722.78 = 645.27/x
  3. Step 3: Cross multiply
    1,815.14x = 2,722.78 × 645.27
  4. Step 4: Simplify right side
    1,815.14x = 1,756,928.25
  5. Step 5: Solve for x
    x = 1,756,928.25/1,815.14
  6. Step 6: Final answer
    x = 967.93

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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.