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Finding the Fourth Proportional to 1,842.64, 2,764.40 and 976.80

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Solution

The fourth proportional to 1,842.64, 2,764.40 and 976.80 is: 1,465.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,842.64 : 2,764.40 = 976.80 : x
  2. Step 2: Convert to fraction form
    1,842.64/2,764.40 = 976.80/x
  3. Step 3: Cross multiply
    1,842.64x = 2,764.40 × 976.80
  4. Step 4: Simplify right side
    1,842.64x = 2,700,265.92
  5. Step 5: Solve for x
    x = 2,700,265.92/1,842.64
  6. Step 6: Final answer
    x = 1,465.43

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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.