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Finding the Fourth Proportional to 508.36, 701.49 and 311.83

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Solution

The fourth proportional to 508.36, 701.49 and 311.83 is: 430.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.36 : 701.49 = 311.83 : x
  2. Step 2: Convert to fraction form
    508.36/701.49 = 311.83/x
  3. Step 3: Cross multiply
    508.36x = 701.49 × 311.83
  4. Step 4: Simplify right side
    508.36x = 218,745.63
  5. Step 5: Solve for x
    x = 218,745.63/508.36
  6. Step 6: Final answer
    x = 430.30

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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.