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Finding the Fourth Proportional to 525.27, 787.18 and 281.31

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Solution

The fourth proportional to 525.27, 787.18 and 281.31 is: 421.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.27 : 787.18 = 281.31 : x
  2. Step 2: Convert to fraction form
    525.27/787.18 = 281.31/x
  3. Step 3: Cross multiply
    525.27x = 787.18 × 281.31
  4. Step 4: Simplify right side
    525.27x = 221,441.61
  5. Step 5: Solve for x
    x = 221,441.61/525.27
  6. Step 6: Final answer
    x = 421.58

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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.