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Finding the Fourth Proportional to 999.86, 1,499.54 and 383.84

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Solution

The fourth proportional to 999.86, 1,499.54 and 383.84 is: 575.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.86 : 1,499.54 = 383.84 : x
  2. Step 2: Convert to fraction form
    999.86/1,499.54 = 383.84/x
  3. Step 3: Cross multiply
    999.86x = 1,499.54 × 383.84
  4. Step 4: Simplify right side
    999.86x = 575,583.43
  5. Step 5: Solve for x
    x = 575,583.43/999.86
  6. Step 6: Final answer
    x = 575.66

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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.