Home / 2,129.60-2,938.74-1,198.16

Finding the Fourth Proportional to 2,129.60, 2,938.74 and 1,198.16

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Solution

The fourth proportional to 2,129.60, 2,938.74 and 1,198.16 is: 1,653.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.60 : 2,938.74 = 1,198.16 : x
  2. Step 2: Convert to fraction form
    2,129.60/2,938.74 = 1,198.16/x
  3. Step 3: Cross multiply
    2,129.60x = 2,938.74 × 1,198.16
  4. Step 4: Simplify right side
    2,129.60x = 3,521,080.72
  5. Step 5: Solve for x
    x = 3,521,080.72/2,129.60
  6. Step 6: Final answer
    x = 1,653.40

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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.