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Finding the Fourth Proportional to 355.96, 530.51 and 355.42

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Solution

The fourth proportional to 355.96, 530.51 and 355.42 is: 529.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.96 : 530.51 = 355.42 : x
  2. Step 2: Convert to fraction form
    355.96/530.51 = 355.42/x
  3. Step 3: Cross multiply
    355.96x = 530.51 × 355.42
  4. Step 4: Simplify right side
    355.96x = 188,553.86
  5. Step 5: Solve for x
    x = 188,553.86/355.96
  6. Step 6: Final answer
    x = 529.71

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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.