Home / 1,555.08-2,136.41-1,391.46

Finding the Fourth Proportional to 1,555.08, 2,136.41 and 1,391.46

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Solution

The fourth proportional to 1,555.08, 2,136.41 and 1,391.46 is: 1,911.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.08 : 2,136.41 = 1,391.46 : x
  2. Step 2: Convert to fraction form
    1,555.08/2,136.41 = 1,391.46/x
  3. Step 3: Cross multiply
    1,555.08x = 2,136.41 × 1,391.46
  4. Step 4: Simplify right side
    1,555.08x = 2,972,722.10
  5. Step 5: Solve for x
    x = 2,972,722.10/1,555.08
  6. Step 6: Final answer
    x = 1,911.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.