Home / 2,818.36-3,888.68-1,638.72

Finding the Fourth Proportional to 2,818.36, 3,888.68 and 1,638.72

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Solution

The fourth proportional to 2,818.36, 3,888.68 and 1,638.72 is: 2,261.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.36 : 3,888.68 = 1,638.72 : x
  2. Step 2: Convert to fraction form
    2,818.36/3,888.68 = 1,638.72/x
  3. Step 3: Cross multiply
    2,818.36x = 3,888.68 × 1,638.72
  4. Step 4: Simplify right side
    2,818.36x = 6,372,457.69
  5. Step 5: Solve for x
    x = 6,372,457.69/2,818.36
  6. Step 6: Final answer
    x = 2,261.05

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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.