Home / 2,333.72-3,220.62-1,389.80

Finding the Fourth Proportional to 2,333.72, 3,220.62 and 1,389.80

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Solution

The fourth proportional to 2,333.72, 3,220.62 and 1,389.80 is: 1,917.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,333.72 : 3,220.62 = 1,389.80 : x
  2. Step 2: Convert to fraction form
    2,333.72/3,220.62 = 1,389.80/x
  3. Step 3: Cross multiply
    2,333.72x = 3,220.62 × 1,389.80
  4. Step 4: Simplify right side
    2,333.72x = 4,476,017.68
  5. Step 5: Solve for x
    x = 4,476,017.68/2,333.72
  6. Step 6: Final answer
    x = 1,917.98

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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.