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Finding the Fourth Proportional to 3,089.70, 4,634.51 and 749.72

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Solution

The fourth proportional to 3,089.70, 4,634.51 and 749.72 is: 1,124.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,089.70 : 4,634.51 = 749.72 : x
  2. Step 2: Convert to fraction form
    3,089.70/4,634.51 = 749.72/x
  3. Step 3: Cross multiply
    3,089.70x = 4,634.51 × 749.72
  4. Step 4: Simplify right side
    3,089.70x = 3,474,575.30
  5. Step 5: Solve for x
    x = 3,474,575.30/3,089.70
  6. Step 6: Final answer
    x = 1,124.57

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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.