Home / 1,379.39-1,899.18-1,169.10

Finding the Fourth Proportional to 1,379.39, 1,899.18 and 1,169.10

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Solution

The fourth proportional to 1,379.39, 1,899.18 and 1,169.10 is: 1,609.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.39 : 1,899.18 = 1,169.10 : x
  2. Step 2: Convert to fraction form
    1,379.39/1,899.18 = 1,169.10/x
  3. Step 3: Cross multiply
    1,379.39x = 1,899.18 × 1,169.10
  4. Step 4: Simplify right side
    1,379.39x = 2,220,331.34
  5. Step 5: Solve for x
    x = 2,220,331.34/1,379.39
  6. Step 6: Final answer
    x = 1,609.65

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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.