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Finding the Fourth Proportional to 2,064.60, 3,096.90 and 765.81

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Solution

The fourth proportional to 2,064.60, 3,096.90 and 765.81 is: 1,148.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,064.60 : 3,096.90 = 765.81 : x
  2. Step 2: Convert to fraction form
    2,064.60/3,096.90 = 765.81/x
  3. Step 3: Cross multiply
    2,064.60x = 3,096.90 × 765.81
  4. Step 4: Simplify right side
    2,064.60x = 2,371,636.99
  5. Step 5: Solve for x
    x = 2,371,636.99/2,064.60
  6. Step 6: Final answer
    x = 1,148.72

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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.