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Finding the Fourth Proportional to 355.16, 529.97 and 318.84

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Solution

The fourth proportional to 355.16, 529.97 and 318.84 is: 475.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.16 : 529.97 = 318.84 : x
  2. Step 2: Convert to fraction form
    355.16/529.97 = 318.84/x
  3. Step 3: Cross multiply
    355.16x = 529.97 × 318.84
  4. Step 4: Simplify right side
    355.16x = 168,975.63
  5. Step 5: Solve for x
    x = 168,975.63/355.16
  6. Step 6: Final answer
    x = 475.77

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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.