Home / 4,810.90-7,220.40-1,891.30

Finding the Fourth Proportional to 4,810.90, 7,220.40 and 1,891.30

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Solution

The fourth proportional to 4,810.90, 7,220.40 and 1,891.30 is: 2,838.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,810.90 : 7,220.40 = 1,891.30 : x
  2. Step 2: Convert to fraction form
    4,810.90/7,220.40 = 1,891.30/x
  3. Step 3: Cross multiply
    4,810.90x = 7,220.40 × 1,891.30
  4. Step 4: Simplify right side
    4,810.90x = 13,655,942.52
  5. Step 5: Solve for x
    x = 13,655,942.52/4,810.90
  6. Step 6: Final answer
    x = 2,838.54

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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.