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Finding the Fourth Proportional to 999.94, 1,499.80 and 259.56

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Solution

The fourth proportional to 999.94, 1,499.80 and 259.56 is: 389.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.94 : 1,499.80 = 259.56 : x
  2. Step 2: Convert to fraction form
    999.94/1,499.80 = 259.56/x
  3. Step 3: Cross multiply
    999.94x = 1,499.80 × 259.56
  4. Step 4: Simplify right side
    999.94x = 389,288.09
  5. Step 5: Solve for x
    x = 389,288.09/999.94
  6. Step 6: Final answer
    x = 389.31

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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.