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Finding the Fourth Proportional to 2,821.79, 3,893.94 and 1,562.76

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Solution

The fourth proportional to 2,821.79, 3,893.94 and 1,562.76 is: 2,156.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.79 : 3,893.94 = 1,562.76 : x
  2. Step 2: Convert to fraction form
    2,821.79/3,893.94 = 1,562.76/x
  3. Step 3: Cross multiply
    2,821.79x = 3,893.94 × 1,562.76
  4. Step 4: Simplify right side
    2,821.79x = 6,085,293.67
  5. Step 5: Solve for x
    x = 6,085,293.67/2,821.79
  6. Step 6: Final answer
    x = 2,156.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.