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Finding the Fourth Proportional to 1,661.72, 2,492.64 and 1,083.38

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Solution

The fourth proportional to 1,661.72, 2,492.64 and 1,083.38 is: 1,625.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.72 : 2,492.64 = 1,083.38 : x
  2. Step 2: Convert to fraction form
    1,661.72/2,492.64 = 1,083.38/x
  3. Step 3: Cross multiply
    1,661.72x = 2,492.64 × 1,083.38
  4. Step 4: Simplify right side
    1,661.72x = 2,700,463.86
  5. Step 5: Solve for x
    x = 2,700,463.86/1,661.72
  6. Step 6: Final answer
    x = 1,625.11

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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.