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Finding the Fourth Proportional to 355.15, 529.87 and 316.17

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Solution

The fourth proportional to 355.15, 529.87 and 316.17 is: 471.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.15 : 529.87 = 316.17 : x
  2. Step 2: Convert to fraction form
    355.15/529.87 = 316.17/x
  3. Step 3: Cross multiply
    355.15x = 529.87 × 316.17
  4. Step 4: Simplify right side
    355.15x = 167,524.77
  5. Step 5: Solve for x
    x = 167,524.77/355.15
  6. Step 6: Final answer
    x = 471.71

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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.