Home / 3,430.19-5,145.29-1,379.63

Finding the Fourth Proportional to 3,430.19, 5,145.29 and 1,379.63

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Solution

The fourth proportional to 3,430.19, 5,145.29 and 1,379.63 is: 2,069.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,430.19 : 5,145.29 = 1,379.63 : x
  2. Step 2: Convert to fraction form
    3,430.19/5,145.29 = 1,379.63/x
  3. Step 3: Cross multiply
    3,430.19x = 5,145.29 × 1,379.63
  4. Step 4: Simplify right side
    3,430.19x = 7,098,589.54
  5. Step 5: Solve for x
    x = 7,098,589.54/3,430.19
  6. Step 6: Final answer
    x = 2,069.45

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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.