Home / 2,817.51-3,886.60-1,638.45

Finding the Fourth Proportional to 2,817.51, 3,886.60 and 1,638.45

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Solution

The fourth proportional to 2,817.51, 3,886.60 and 1,638.45 is: 2,260.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.51 : 3,886.60 = 1,638.45 : x
  2. Step 2: Convert to fraction form
    2,817.51/3,886.60 = 1,638.45/x
  3. Step 3: Cross multiply
    2,817.51x = 3,886.60 × 1,638.45
  4. Step 4: Simplify right side
    2,817.51x = 6,367,999.77
  5. Step 5: Solve for x
    x = 6,367,999.77/2,817.51
  6. Step 6: Final answer
    x = 2,260.15

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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.