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Finding the Fourth Proportional to 525.20, 787.20 and 308.96

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Solution

The fourth proportional to 525.20, 787.20 and 308.96 is: 463.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.20 : 787.20 = 308.96 : x
  2. Step 2: Convert to fraction form
    525.20/787.20 = 308.96/x
  3. Step 3: Cross multiply
    525.20x = 787.20 × 308.96
  4. Step 4: Simplify right side
    525.20x = 243,213.31
  5. Step 5: Solve for x
    x = 243,213.31/525.20
  6. Step 6: Final answer
    x = 463.09

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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.