Home / 2,810.65-4,212.60-1,638.40

Finding the Fourth Proportional to 2,810.65, 4,212.60 and 1,638.40

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Solution

The fourth proportional to 2,810.65, 4,212.60 and 1,638.40 is: 2,455.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.65 : 4,212.60 = 1,638.40 : x
  2. Step 2: Convert to fraction form
    2,810.65/4,212.60 = 1,638.40/x
  3. Step 3: Cross multiply
    2,810.65x = 4,212.60 × 1,638.40
  4. Step 4: Simplify right side
    2,810.65x = 6,901,923.84
  5. Step 5: Solve for x
    x = 6,901,923.84/2,810.65
  6. Step 6: Final answer
    x = 2,455.63

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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.