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Finding the Fourth Proportional to 1,903.66, 2,855.50 and 749.41

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Solution

The fourth proportional to 1,903.66, 2,855.50 and 749.41 is: 1,124.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,903.66 : 2,855.50 = 749.41 : x
  2. Step 2: Convert to fraction form
    1,903.66/2,855.50 = 749.41/x
  3. Step 3: Cross multiply
    1,903.66x = 2,855.50 × 749.41
  4. Step 4: Simplify right side
    1,903.66x = 2,139,940.26
  5. Step 5: Solve for x
    x = 2,139,940.26/1,903.66
  6. Step 6: Final answer
    x = 1,124.12

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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.