Home / 2,811.51-4,215.44-1,513.89

Finding the Fourth Proportional to 2,811.51, 4,215.44 and 1,513.89

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Solution

The fourth proportional to 2,811.51, 4,215.44 and 1,513.89 is: 2,269.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.51 : 4,215.44 = 1,513.89 : x
  2. Step 2: Convert to fraction form
    2,811.51/4,215.44 = 1,513.89/x
  3. Step 3: Cross multiply
    2,811.51x = 4,215.44 × 1,513.89
  4. Step 4: Simplify right side
    2,811.51x = 6,381,683.81
  5. Step 5: Solve for x
    x = 6,381,683.81/2,811.51
  6. Step 6: Final answer
    x = 2,269.85

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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.