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Finding the Fourth Proportional to 3,711.79, 5,561.76 and 2,720.01

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Solution

The fourth proportional to 3,711.79, 5,561.76 and 2,720.01 is: 4,075.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,711.79 : 5,561.76 = 2,720.01 : x
  2. Step 2: Convert to fraction form
    3,711.79/5,561.76 = 2,720.01/x
  3. Step 3: Cross multiply
    3,711.79x = 5,561.76 × 2,720.01
  4. Step 4: Simplify right side
    3,711.79x = 15,128,050.41
  5. Step 5: Solve for x
    x = 15,128,050.41/3,711.79
  6. Step 6: Final answer
    x = 4,075.67

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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.