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Finding the Fourth Proportional to 355.17, 531.46 and 307

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Solution

The fourth proportional to 355.17, 531.46 and 307 is: 459.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.17 : 531.46 = 307 : x
  2. Step 2: Convert to fraction form
    355.17/531.46 = 307/x
  3. Step 3: Cross multiply
    355.17x = 531.46 × 307
  4. Step 4: Simplify right side
    355.17x = 163,158.22
  5. Step 5: Solve for x
    x = 163,158.22/355.17
  6. Step 6: Final answer
    x = 459.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.