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Finding the Fourth Proportional to 1,916, 2,873.44 and 875.45

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Solution

The fourth proportional to 1,916, 2,873.44 and 875.45 is: 1,312.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916 : 2,873.44 = 875.45 : x
  2. Step 2: Convert to fraction form
    1,916/2,873.44 = 875.45/x
  3. Step 3: Cross multiply
    1,916x = 2,873.44 × 875.45
  4. Step 4: Simplify right side
    1,916x = 2,515,553.05
  5. Step 5: Solve for x
    x = 2,515,553.05/1,916
  6. Step 6: Final answer
    x = 1,312.92

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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.