Home / 3,430.68-5,142.94-1,238.90

Finding the Fourth Proportional to 3,430.68, 5,142.94 and 1,238.90

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Solution

The fourth proportional to 3,430.68, 5,142.94 and 1,238.90 is: 1,857.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,430.68 : 5,142.94 = 1,238.90 : x
  2. Step 2: Convert to fraction form
    3,430.68/5,142.94 = 1,238.90/x
  3. Step 3: Cross multiply
    3,430.68x = 5,142.94 × 1,238.90
  4. Step 4: Simplify right side
    3,430.68x = 6,371,566.52
  5. Step 5: Solve for x
    x = 6,371,566.52/3,430.68
  6. Step 6: Final answer
    x = 1,857.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.