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Finding the Fourth Proportional to 1,785.08, 2,677.22 and 486.66

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Solution

The fourth proportional to 1,785.08, 2,677.22 and 486.66 is: 729.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.08 : 2,677.22 = 486.66 : x
  2. Step 2: Convert to fraction form
    1,785.08/2,677.22 = 486.66/x
  3. Step 3: Cross multiply
    1,785.08x = 2,677.22 × 486.66
  4. Step 4: Simplify right side
    1,785.08x = 1,302,895.89
  5. Step 5: Solve for x
    x = 1,302,895.89/1,785.08
  6. Step 6: Final answer
    x = 729.88

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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.