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Finding the Fourth Proportional to 1,371.61, 1,893.44 and 874.92

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Solution

The fourth proportional to 1,371.61, 1,893.44 and 874.92 is: 1,207.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.61 : 1,893.44 = 874.92 : x
  2. Step 2: Convert to fraction form
    1,371.61/1,893.44 = 874.92/x
  3. Step 3: Cross multiply
    1,371.61x = 1,893.44 × 874.92
  4. Step 4: Simplify right side
    1,371.61x = 1,656,594.68
  5. Step 5: Solve for x
    x = 1,656,594.68/1,371.61
  6. Step 6: Final answer
    x = 1,207.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.