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Finding the Fourth Proportional to 2,572.74, 3,859.02 and 1,790.49

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Solution

The fourth proportional to 2,572.74, 3,859.02 and 1,790.49 is: 2,685.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,572.74 : 3,859.02 = 1,790.49 : x
  2. Step 2: Convert to fraction form
    2,572.74/3,859.02 = 1,790.49/x
  3. Step 3: Cross multiply
    2,572.74x = 3,859.02 × 1,790.49
  4. Step 4: Simplify right side
    2,572.74x = 6,909,536.72
  5. Step 5: Solve for x
    x = 6,909,536.72/2,572.74
  6. Step 6: Final answer
    x = 2,685.67

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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.