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Finding the Fourth Proportional to 2,607.70, 3,911.93 and 758.58

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Solution

The fourth proportional to 2,607.70, 3,911.93 and 758.58 is: 1,137.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,607.70 : 3,911.93 = 758.58 : x
  2. Step 2: Convert to fraction form
    2,607.70/3,911.93 = 758.58/x
  3. Step 3: Cross multiply
    2,607.70x = 3,911.93 × 758.58
  4. Step 4: Simplify right side
    2,607.70x = 2,967,499.09
  5. Step 5: Solve for x
    x = 2,967,499.09/2,607.70
  6. Step 6: Final answer
    x = 1,137.98

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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.