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Finding the Fourth Proportional to 3,911, 5,866.56 and 1,175

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Solution

The fourth proportional to 3,911, 5,866.56 and 1,175 is: 1,762.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911 : 5,866.56 = 1,175 : x
  2. Step 2: Convert to fraction form
    3,911/5,866.56 = 1,175/x
  3. Step 3: Cross multiply
    3,911x = 5,866.56 × 1,175
  4. Step 4: Simplify right side
    3,911x = 6,893,208.00
  5. Step 5: Solve for x
    x = 6,893,208.00/3,911
  6. Step 6: Final answer
    x = 1,762.52

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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.