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Finding the Fourth Proportional to 570.70, 857.31 and 351.90

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Solution

The fourth proportional to 570.70, 857.31 and 351.90 is: 528.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.70 : 857.31 = 351.90 : x
  2. Step 2: Convert to fraction form
    570.70/857.31 = 351.90/x
  3. Step 3: Cross multiply
    570.70x = 857.31 × 351.90
  4. Step 4: Simplify right side
    570.70x = 301,687.39
  5. Step 5: Solve for x
    x = 301,687.39/570.70
  6. Step 6: Final answer
    x = 528.63

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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.