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Finding the Fourth Proportional to 2,782.91, 3,838.74 and 1,838.71

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Solution

The fourth proportional to 2,782.91, 3,838.74 and 1,838.71 is: 2,536.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,782.91 : 3,838.74 = 1,838.71 : x
  2. Step 2: Convert to fraction form
    2,782.91/3,838.74 = 1,838.71/x
  3. Step 3: Cross multiply
    2,782.91x = 3,838.74 × 1,838.71
  4. Step 4: Simplify right side
    2,782.91x = 7,058,329.63
  5. Step 5: Solve for x
    x = 7,058,329.63/2,782.91
  6. Step 6: Final answer
    x = 2,536.31

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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.