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Finding the Fourth Proportional to 999.11, 1,499.44 and 693.11

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Solution

The fourth proportional to 999.11, 1,499.44 and 693.11 is: 1,040.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.11 : 1,499.44 = 693.11 : x
  2. Step 2: Convert to fraction form
    999.11/1,499.44 = 693.11/x
  3. Step 3: Cross multiply
    999.11x = 1,499.44 × 693.11
  4. Step 4: Simplify right side
    999.11x = 1,039,276.86
  5. Step 5: Solve for x
    x = 1,039,276.86/999.11
  6. Step 6: Final answer
    x = 1,040.20

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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.