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Finding the Fourth Proportional to 1,814.94, 2,722.70 and 645.32

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Solution

The fourth proportional to 1,814.94, 2,722.70 and 645.32 is: 968.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,814.94 : 2,722.70 = 645.32 : x
  2. Step 2: Convert to fraction form
    1,814.94/2,722.70 = 645.32/x
  3. Step 3: Cross multiply
    1,814.94x = 2,722.70 × 645.32
  4. Step 4: Simplify right side
    1,814.94x = 1,757,012.76
  5. Step 5: Solve for x
    x = 1,757,012.76/1,814.94
  6. Step 6: Final answer
    x = 968.08

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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.