Home / 1,555.56-2,141.75-1,318.99

Finding the Fourth Proportional to 1,555.56, 2,141.75 and 1,318.99

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Solution

The fourth proportional to 1,555.56, 2,141.75 and 1,318.99 is: 1,816.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.56 : 2,141.75 = 1,318.99 : x
  2. Step 2: Convert to fraction form
    1,555.56/2,141.75 = 1,318.99/x
  3. Step 3: Cross multiply
    1,555.56x = 2,141.75 × 1,318.99
  4. Step 4: Simplify right side
    1,555.56x = 2,824,944.78
  5. Step 5: Solve for x
    x = 2,824,944.78/1,555.56
  6. Step 6: Final answer
    x = 1,816.03

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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.