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Finding the Fourth Proportional to 1,660.60, 2,486.10 and 1,487.80

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Solution

The fourth proportional to 1,660.60, 2,486.10 and 1,487.80 is: 2,227.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.60 : 2,486.10 = 1,487.80 : x
  2. Step 2: Convert to fraction form
    1,660.60/2,486.10 = 1,487.80/x
  3. Step 3: Cross multiply
    1,660.60x = 2,486.10 × 1,487.80
  4. Step 4: Simplify right side
    1,660.60x = 3,698,819.58
  5. Step 5: Solve for x
    x = 3,698,819.58/1,660.60
  6. Step 6: Final answer
    x = 2,227.40

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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.