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Finding the Fourth Proportional to 4,170.69, 6,255.90 and 1,980.99

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Solution

The fourth proportional to 4,170.69, 6,255.90 and 1,980.99 is: 2,971.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,170.69 : 6,255.90 = 1,980.99 : x
  2. Step 2: Convert to fraction form
    4,170.69/6,255.90 = 1,980.99/x
  3. Step 3: Cross multiply
    4,170.69x = 6,255.90 × 1,980.99
  4. Step 4: Simplify right side
    4,170.69x = 12,392,875.34
  5. Step 5: Solve for x
    x = 12,392,875.34/4,170.69
  6. Step 6: Final answer
    x = 2,971.42

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1.5x scale

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.