Home / 2,126.40-2,934.72-1,340.64

Finding the Fourth Proportional to 2,126.40, 2,934.72 and 1,340.64

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Solution

The fourth proportional to 2,126.40, 2,934.72 and 1,340.64 is: 1,850.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.40 : 2,934.72 = 1,340.64 : x
  2. Step 2: Convert to fraction form
    2,126.40/2,934.72 = 1,340.64/x
  3. Step 3: Cross multiply
    2,126.40x = 2,934.72 × 1,340.64
  4. Step 4: Simplify right side
    2,126.40x = 3,934,403.02
  5. Step 5: Solve for x
    x = 3,934,403.02/2,126.40
  6. Step 6: Final answer
    x = 1,850.26

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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.