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Finding the Fourth Proportional to 3,668.90, 5,063.09 and 1,990.32

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Solution

The fourth proportional to 3,668.90, 5,063.09 and 1,990.32 is: 2,746.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,668.90 : 5,063.09 = 1,990.32 : x
  2. Step 2: Convert to fraction form
    3,668.90/5,063.09 = 1,990.32/x
  3. Step 3: Cross multiply
    3,668.90x = 5,063.09 × 1,990.32
  4. Step 4: Simplify right side
    3,668.90x = 10,077,159.34
  5. Step 5: Solve for x
    x = 10,077,159.34/3,668.90
  6. Step 6: Final answer
    x = 2,746.65

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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.