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Finding the Fourth Proportional to 2,847.69, 3,929.85 and 1,668.47

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Solution

The fourth proportional to 2,847.69, 3,929.85 and 1,668.47 is: 2,302.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.69 : 3,929.85 = 1,668.47 : x
  2. Step 2: Convert to fraction form
    2,847.69/3,929.85 = 1,668.47/x
  3. Step 3: Cross multiply
    2,847.69x = 3,929.85 × 1,668.47
  4. Step 4: Simplify right side
    2,847.69x = 6,556,817.18
  5. Step 5: Solve for x
    x = 6,556,817.18/2,847.69
  6. Step 6: Final answer
    x = 2,302.50

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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.