Home / 1,698.20-2,343.16-1,139.37

Finding the Fourth Proportional to 1,698.20, 2,343.16 and 1,139.37

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Solution

The fourth proportional to 1,698.20, 2,343.16 and 1,139.37 is: 1,572.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,698.20 : 2,343.16 = 1,139.37 : x
  2. Step 2: Convert to fraction form
    1,698.20/2,343.16 = 1,139.37/x
  3. Step 3: Cross multiply
    1,698.20x = 2,343.16 × 1,139.37
  4. Step 4: Simplify right side
    1,698.20x = 2,669,720.51
  5. Step 5: Solve for x
    x = 2,669,720.51/1,698.20
  6. Step 6: Final answer
    x = 1,572.09

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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.