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Finding the Fourth Proportional to 508.52, 701.77 and 311.99

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Solution

The fourth proportional to 508.52, 701.77 and 311.99 is: 430.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.52 : 701.77 = 311.99 : x
  2. Step 2: Convert to fraction form
    508.52/701.77 = 311.99/x
  3. Step 3: Cross multiply
    508.52x = 701.77 × 311.99
  4. Step 4: Simplify right side
    508.52x = 218,945.22
  5. Step 5: Solve for x
    x = 218,945.22/508.52
  6. Step 6: Final answer
    x = 430.55

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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.