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Finding the Fourth Proportional to 535.83, 739.31 and 311.69

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Solution

The fourth proportional to 535.83, 739.31 and 311.69 is: 430.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.83 : 739.31 = 311.69 : x
  2. Step 2: Convert to fraction form
    535.83/739.31 = 311.69/x
  3. Step 3: Cross multiply
    535.83x = 739.31 × 311.69
  4. Step 4: Simplify right side
    535.83x = 230,430.28
  5. Step 5: Solve for x
    x = 230,430.28/535.83
  6. Step 6: Final answer
    x = 430.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.