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Finding the Fourth Proportional to 624.81, 936.77 and 316.81

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Solution

The fourth proportional to 624.81, 936.77 and 316.81 is: 474.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.81 : 936.77 = 316.81 : x
  2. Step 2: Convert to fraction form
    624.81/936.77 = 316.81/x
  3. Step 3: Cross multiply
    624.81x = 936.77 × 316.81
  4. Step 4: Simplify right side
    624.81x = 296,777.69
  5. Step 5: Solve for x
    x = 296,777.69/624.81
  6. Step 6: Final answer
    x = 474.99

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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.