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Finding the Fourth Proportional to 999.99, 1,499.99 and 306.66

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Solution

The fourth proportional to 999.99, 1,499.99 and 306.66 is: 459.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.99 : 1,499.99 = 306.66 : x
  2. Step 2: Convert to fraction form
    999.99/1,499.99 = 306.66/x
  3. Step 3: Cross multiply
    999.99x = 1,499.99 × 306.66
  4. Step 4: Simplify right side
    999.99x = 459,986.93
  5. Step 5: Solve for x
    x = 459,986.93/999.99
  6. Step 6: Final answer
    x = 459.99

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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.