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Finding the Fourth Proportional to 3,483.65, 5,220.72 and 1,921.31

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Solution

The fourth proportional to 3,483.65, 5,220.72 and 1,921.31 is: 2,879.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,483.65 : 5,220.72 = 1,921.31 : x
  2. Step 2: Convert to fraction form
    3,483.65/5,220.72 = 1,921.31/x
  3. Step 3: Cross multiply
    3,483.65x = 5,220.72 × 1,921.31
  4. Step 4: Simplify right side
    3,483.65x = 10,030,595.44
  5. Step 5: Solve for x
    x = 10,030,595.44/3,483.65
  6. Step 6: Final answer
    x = 2,879.34

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1.5x scale

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.