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Finding the Fourth Proportional to 3,129.84, 4,695.30 and 1,668.60

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Solution

The fourth proportional to 3,129.84, 4,695.30 and 1,668.60 is: 2,503.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.84 : 4,695.30 = 1,668.60 : x
  2. Step 2: Convert to fraction form
    3,129.84/4,695.30 = 1,668.60/x
  3. Step 3: Cross multiply
    3,129.84x = 4,695.30 × 1,668.60
  4. Step 4: Simplify right side
    3,129.84x = 7,834,577.58
  5. Step 5: Solve for x
    x = 7,834,577.58/3,129.84
  6. Step 6: Final answer
    x = 2,503.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.