Home / 2,115.19-2,918.26-1,370.13

Finding the Fourth Proportional to 2,115.19, 2,918.26 and 1,370.13

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Solution

The fourth proportional to 2,115.19, 2,918.26 and 1,370.13 is: 1,890.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.19 : 2,918.26 = 1,370.13 : x
  2. Step 2: Convert to fraction form
    2,115.19/2,918.26 = 1,370.13/x
  3. Step 3: Cross multiply
    2,115.19x = 2,918.26 × 1,370.13
  4. Step 4: Simplify right side
    2,115.19x = 3,998,395.57
  5. Step 5: Solve for x
    x = 3,998,395.57/2,115.19
  6. Step 6: Final answer
    x = 1,890.32

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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.