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Finding the Fourth Proportional to 570.36, 787.05 and 349.28

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Solution

The fourth proportional to 570.36, 787.05 and 349.28 is: 481.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.36 : 787.05 = 349.28 : x
  2. Step 2: Convert to fraction form
    570.36/787.05 = 349.28/x
  3. Step 3: Cross multiply
    570.36x = 787.05 × 349.28
  4. Step 4: Simplify right side
    570.36x = 274,900.82
  5. Step 5: Solve for x
    x = 274,900.82/570.36
  6. Step 6: Final answer
    x = 481.98

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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.