Home / 2,276.12-3,139.48-1,392.36

Finding the Fourth Proportional to 2,276.12, 3,139.48 and 1,392.36

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Solution

The fourth proportional to 2,276.12, 3,139.48 and 1,392.36 is: 1,920.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,276.12 : 3,139.48 = 1,392.36 : x
  2. Step 2: Convert to fraction form
    2,276.12/3,139.48 = 1,392.36/x
  3. Step 3: Cross multiply
    2,276.12x = 3,139.48 × 1,392.36
  4. Step 4: Simplify right side
    2,276.12x = 4,371,287.26
  5. Step 5: Solve for x
    x = 4,371,287.26/2,276.12
  6. Step 6: Final answer
    x = 1,920.50

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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.