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Finding the Fourth Proportional to 1,877.21, 2,815.79 and 836.94

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Solution

The fourth proportional to 1,877.21, 2,815.79 and 836.94 is: 1,255.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,877.21 : 2,815.79 = 836.94 : x
  2. Step 2: Convert to fraction form
    1,877.21/2,815.79 = 836.94/x
  3. Step 3: Cross multiply
    1,877.21x = 2,815.79 × 836.94
  4. Step 4: Simplify right side
    1,877.21x = 2,356,643.10
  5. Step 5: Solve for x
    x = 2,356,643.10/1,877.21
  6. Step 6: Final answer
    x = 1,255.40

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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.