Home / 2,138.39-2,948.60-1,391.16

Finding the Fourth Proportional to 2,138.39, 2,948.60 and 1,391.16

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Solution

The fourth proportional to 2,138.39, 2,948.60 and 1,391.16 is: 1,918.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.39 : 2,948.60 = 1,391.16 : x
  2. Step 2: Convert to fraction form
    2,138.39/2,948.60 = 1,391.16/x
  3. Step 3: Cross multiply
    2,138.39x = 2,948.60 × 1,391.16
  4. Step 4: Simplify right side
    2,138.39x = 4,101,967.42
  5. Step 5: Solve for x
    x = 4,101,967.42/2,138.39
  6. Step 6: Final answer
    x = 1,918.25

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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.