Home / 2,857.60-3,945.36-1,914.76

Finding the Fourth Proportional to 2,857.60, 3,945.36 and 1,914.76

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Solution

The fourth proportional to 2,857.60, 3,945.36 and 1,914.76 is: 2,643.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.60 : 3,945.36 = 1,914.76 : x
  2. Step 2: Convert to fraction form
    2,857.60/3,945.36 = 1,914.76/x
  3. Step 3: Cross multiply
    2,857.60x = 3,945.36 × 1,914.76
  4. Step 4: Simplify right side
    2,857.60x = 7,554,417.51
  5. Step 5: Solve for x
    x = 7,554,417.51/2,857.60
  6. Step 6: Final answer
    x = 2,643.62

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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.