Home / 1,942.68-2,679.48-1,353.40

Finding the Fourth Proportional to 1,942.68, 2,679.48 and 1,353.40

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Solution

The fourth proportional to 1,942.68, 2,679.48 and 1,353.40 is: 1,866.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942.68 : 2,679.48 = 1,353.40 : x
  2. Step 2: Convert to fraction form
    1,942.68/2,679.48 = 1,353.40/x
  3. Step 3: Cross multiply
    1,942.68x = 2,679.48 × 1,353.40
  4. Step 4: Simplify right side
    1,942.68x = 3,626,408.23
  5. Step 5: Solve for x
    x = 3,626,408.23/1,942.68
  6. Step 6: Final answer
    x = 1,866.70

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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.