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Finding the Fourth Proportional to 1,893.86, 2,617.13 and 1,420.93

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Solution

The fourth proportional to 1,893.86, 2,617.13 and 1,420.93 is: 1,963.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,893.86 : 2,617.13 = 1,420.93 : x
  2. Step 2: Convert to fraction form
    1,893.86/2,617.13 = 1,420.93/x
  3. Step 3: Cross multiply
    1,893.86x = 2,617.13 × 1,420.93
  4. Step 4: Simplify right side
    1,893.86x = 3,718,758.53
  5. Step 5: Solve for x
    x = 3,718,758.53/1,893.86
  6. Step 6: Final answer
    x = 1,963.59

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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.