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Finding the Fourth Proportional to 1,842.78, 2,763.36 and 976.89

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Solution

The fourth proportional to 1,842.78, 2,763.36 and 976.89 is: 1,464.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,842.78 : 2,763.36 = 976.89 : x
  2. Step 2: Convert to fraction form
    1,842.78/2,763.36 = 976.89/x
  3. Step 3: Cross multiply
    1,842.78x = 2,763.36 × 976.89
  4. Step 4: Simplify right side
    1,842.78x = 2,699,498.75
  5. Step 5: Solve for x
    x = 2,699,498.75/1,842.78
  6. Step 6: Final answer
    x = 1,464.91

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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.