Home / 1,921.06-2,650.65-1,223.62

Finding the Fourth Proportional to 1,921.06, 2,650.65 and 1,223.62

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Solution

The fourth proportional to 1,921.06, 2,650.65 and 1,223.62 is: 1,688.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.06 : 2,650.65 = 1,223.62 : x
  2. Step 2: Convert to fraction form
    1,921.06/2,650.65 = 1,223.62/x
  3. Step 3: Cross multiply
    1,921.06x = 2,650.65 × 1,223.62
  4. Step 4: Simplify right side
    1,921.06x = 3,243,388.35
  5. Step 5: Solve for x
    x = 3,243,388.35/1,921.06
  6. Step 6: Final answer
    x = 1,688.33

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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.