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Finding the Fourth Proportional to 482.76, 665.52 and 316.69

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Solution

The fourth proportional to 482.76, 665.52 and 316.69 is: 436.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.76 : 665.52 = 316.69 : x
  2. Step 2: Convert to fraction form
    482.76/665.52 = 316.69/x
  3. Step 3: Cross multiply
    482.76x = 665.52 × 316.69
  4. Step 4: Simplify right side
    482.76x = 210,760.68
  5. Step 5: Solve for x
    x = 210,760.68/482.76
  6. Step 6: Final answer
    x = 436.57

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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.