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Finding the Fourth Proportional to 999.85, 1,499.78 and 351.13

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Solution

The fourth proportional to 999.85, 1,499.78 and 351.13 is: 526.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.85 : 1,499.78 = 351.13 : x
  2. Step 2: Convert to fraction form
    999.85/1,499.78 = 351.13/x
  3. Step 3: Cross multiply
    999.85x = 1,499.78 × 351.13
  4. Step 4: Simplify right side
    999.85x = 526,617.75
  5. Step 5: Solve for x
    x = 526,617.75/999.85
  6. Step 6: Final answer
    x = 526.70

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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.