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Finding the Fourth Proportional to 2,659.70, 3,980.10 and 2,316.80

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Solution

The fourth proportional to 2,659.70, 3,980.10 and 2,316.80 is: 3,466.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,659.70 : 3,980.10 = 2,316.80 : x
  2. Step 2: Convert to fraction form
    2,659.70/3,980.10 = 2,316.80/x
  3. Step 3: Cross multiply
    2,659.70x = 3,980.10 × 2,316.80
  4. Step 4: Simplify right side
    2,659.70x = 9,221,095.68
  5. Step 5: Solve for x
    x = 9,221,095.68/2,659.70
  6. Step 6: Final answer
    x = 3,466.97

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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.