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Finding the Fourth Proportional to 508.41, 701.66 and 311.92

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Solution

The fourth proportional to 508.41, 701.66 and 311.92 is: 430.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.41 : 701.66 = 311.92 : x
  2. Step 2: Convert to fraction form
    508.41/701.66 = 311.92/x
  3. Step 3: Cross multiply
    508.41x = 701.66 × 311.92
  4. Step 4: Simplify right side
    508.41x = 218,860.81
  5. Step 5: Solve for x
    x = 218,860.81/508.41
  6. Step 6: Final answer
    x = 430.48

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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.