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Finding the Fourth Proportional to 3,111.00, 4,666.50 and 919.56

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Solution

The fourth proportional to 3,111.00, 4,666.50 and 919.56 is: 1,379.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.00 : 4,666.50 = 919.56 : x
  2. Step 2: Convert to fraction form
    3,111.00/4,666.50 = 919.56/x
  3. Step 3: Cross multiply
    3,111.00x = 4,666.50 × 919.56
  4. Step 4: Simplify right side
    3,111.00x = 4,291,117.99
  5. Step 5: Solve for x
    x = 4,291,117.99/3,111.00
  6. Step 6: Final answer
    x = 1,379.34

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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.