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Finding the Fourth Proportional to 1,885.70, 2,827.64 and 1,105.88

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Solution

The fourth proportional to 1,885.70, 2,827.64 and 1,105.88 is: 1,658.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,885.70 : 2,827.64 = 1,105.88 : x
  2. Step 2: Convert to fraction form
    1,885.70/2,827.64 = 1,105.88/x
  3. Step 3: Cross multiply
    1,885.70x = 2,827.64 × 1,105.88
  4. Step 4: Simplify right side
    1,885.70x = 3,127,019.15
  5. Step 5: Solve for x
    x = 3,127,019.15/1,885.70
  6. Step 6: Final answer
    x = 1,658.28

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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.