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Finding the Fourth Proportional to 2,654.58, 3,980.30 and 805.16

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Solution

The fourth proportional to 2,654.58, 3,980.30 and 805.16 is: 1,207.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,654.58 : 3,980.30 = 805.16 : x
  2. Step 2: Convert to fraction form
    2,654.58/3,980.30 = 805.16/x
  3. Step 3: Cross multiply
    2,654.58x = 3,980.30 × 805.16
  4. Step 4: Simplify right side
    2,654.58x = 3,204,778.35
  5. Step 5: Solve for x
    x = 3,204,778.35/2,654.58
  6. Step 6: Final answer
    x = 1,207.26

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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.