Home / 2,817.18-3,888.14-1,638.63

Finding the Fourth Proportional to 2,817.18, 3,888.14 and 1,638.63

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Solution

The fourth proportional to 2,817.18, 3,888.14 and 1,638.63 is: 2,261.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.18 : 3,888.14 = 1,638.63 : x
  2. Step 2: Convert to fraction form
    2,817.18/3,888.14 = 1,638.63/x
  3. Step 3: Cross multiply
    2,817.18x = 3,888.14 × 1,638.63
  4. Step 4: Simplify right side
    2,817.18x = 6,371,214.66
  5. Step 5: Solve for x
    x = 6,371,214.66/2,817.18
  6. Step 6: Final answer
    x = 2,261.56

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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.