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Finding the Fourth Proportional to 355.38, 529.97 and 316.05

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Solution

The fourth proportional to 355.38, 529.97 and 316.05 is: 471.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.38 : 529.97 = 316.05 : x
  2. Step 2: Convert to fraction form
    355.38/529.97 = 316.05/x
  3. Step 3: Cross multiply
    355.38x = 529.97 × 316.05
  4. Step 4: Simplify right side
    355.38x = 167,497.02
  5. Step 5: Solve for x
    x = 167,497.02/355.38
  6. Step 6: Final answer
    x = 471.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.