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Finding the Fourth Proportional to 482.55, 665.70 and 316.56

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Solution

The fourth proportional to 482.55, 665.70 and 316.56 is: 436.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.55 : 665.70 = 316.56 : x
  2. Step 2: Convert to fraction form
    482.55/665.70 = 316.56/x
  3. Step 3: Cross multiply
    482.55x = 665.70 × 316.56
  4. Step 4: Simplify right side
    482.55x = 210,733.99
  5. Step 5: Solve for x
    x = 210,733.99/482.55
  6. Step 6: Final answer
    x = 436.71

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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.