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Finding the Fourth Proportional to 1,666.86, 2,498.13 and 1,081.77

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Solution

The fourth proportional to 1,666.86, 2,498.13 and 1,081.77 is: 1,621.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.86 : 2,498.13 = 1,081.77 : x
  2. Step 2: Convert to fraction form
    1,666.86/2,498.13 = 1,081.77/x
  3. Step 3: Cross multiply
    1,666.86x = 2,498.13 × 1,081.77
  4. Step 4: Simplify right side
    1,666.86x = 2,702,402.09
  5. Step 5: Solve for x
    x = 2,702,402.09/1,666.86
  6. Step 6: Final answer
    x = 1,621.25

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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.