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Finding the Fourth Proportional to 570.49, 787.11 and 349.21

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Solution

The fourth proportional to 570.49, 787.11 and 349.21 is: 481.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.49 : 787.11 = 349.21 : x
  2. Step 2: Convert to fraction form
    570.49/787.11 = 349.21/x
  3. Step 3: Cross multiply
    570.49x = 787.11 × 349.21
  4. Step 4: Simplify right side
    570.49x = 274,864.94
  5. Step 5: Solve for x
    x = 274,864.94/570.49
  6. Step 6: Final answer
    x = 481.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.