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Finding the Fourth Proportional to 570.25, 855.33 and 223.45

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Solution

The fourth proportional to 570.25, 855.33 and 223.45 is: 335.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.25 : 855.33 = 223.45 : x
  2. Step 2: Convert to fraction form
    570.25/855.33 = 223.45/x
  3. Step 3: Cross multiply
    570.25x = 855.33 × 223.45
  4. Step 4: Simplify right side
    570.25x = 191,123.49
  5. Step 5: Solve for x
    x = 191,123.49/570.25
  6. Step 6: Final answer
    x = 335.16

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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.