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Finding the Fourth Proportional to 1,576.91, 2,365.40 and 711.23

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Solution

The fourth proportional to 1,576.91, 2,365.40 and 711.23 is: 1,066.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,576.91 : 2,365.40 = 711.23 : x
  2. Step 2: Convert to fraction form
    1,576.91/2,365.40 = 711.23/x
  3. Step 3: Cross multiply
    1,576.91x = 2,365.40 × 711.23
  4. Step 4: Simplify right side
    1,576.91x = 1,682,333.39
  5. Step 5: Solve for x
    x = 1,682,333.39/1,576.91
  6. Step 6: Final answer
    x = 1,066.85

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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.