Home / 1,889.60-2,605.38-1,668.20

Finding the Fourth Proportional to 1,889.60, 2,605.38 and 1,668.20

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Solution

The fourth proportional to 1,889.60, 2,605.38 and 1,668.20 is: 2,300.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.60 : 2,605.38 = 1,668.20 : x
  2. Step 2: Convert to fraction form
    1,889.60/2,605.38 = 1,668.20/x
  3. Step 3: Cross multiply
    1,889.60x = 2,605.38 × 1,668.20
  4. Step 4: Simplify right side
    1,889.60x = 4,346,294.92
  5. Step 5: Solve for x
    x = 4,346,294.92/1,889.60
  6. Step 6: Final answer
    x = 2,300.11

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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.