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Finding the Fourth Proportional to 572.06, 857.22 and 379.28

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Solution

The fourth proportional to 572.06, 857.22 and 379.28 is: 568.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.06 : 857.22 = 379.28 : x
  2. Step 2: Convert to fraction form
    572.06/857.22 = 379.28/x
  3. Step 3: Cross multiply
    572.06x = 857.22 × 379.28
  4. Step 4: Simplify right side
    572.06x = 325,126.40
  5. Step 5: Solve for x
    x = 325,126.40/572.06
  6. Step 6: Final answer
    x = 568.34

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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.