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Finding the Fourth Proportional to 2,271.57, 3,405.92 and 711.11

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Solution

The fourth proportional to 2,271.57, 3,405.92 and 711.11 is: 1,066.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,271.57 : 3,405.92 = 711.11 : x
  2. Step 2: Convert to fraction form
    2,271.57/3,405.92 = 711.11/x
  3. Step 3: Cross multiply
    2,271.57x = 3,405.92 × 711.11
  4. Step 4: Simplify right side
    2,271.57x = 2,421,963.19
  5. Step 5: Solve for x
    x = 2,421,963.19/2,271.57
  6. Step 6: Final answer
    x = 1,066.21

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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.