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Finding the Fourth Proportional to 1,853.66, 2,779.28 and 879.24

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Solution

The fourth proportional to 1,853.66, 2,779.28 and 879.24 is: 1,318.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,853.66 : 2,779.28 = 879.24 : x
  2. Step 2: Convert to fraction form
    1,853.66/2,779.28 = 879.24/x
  3. Step 3: Cross multiply
    1,853.66x = 2,779.28 × 879.24
  4. Step 4: Simplify right side
    1,853.66x = 2,443,654.15
  5. Step 5: Solve for x
    x = 2,443,654.15/1,853.66
  6. Step 6: Final answer
    x = 1,318.29

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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.