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Finding the Fourth Proportional to 572.56, 858.80 and 207.28

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Solution

The fourth proportional to 572.56, 858.80 and 207.28 is: 310.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.56 : 858.80 = 207.28 : x
  2. Step 2: Convert to fraction form
    572.56/858.80 = 207.28/x
  3. Step 3: Cross multiply
    572.56x = 858.80 × 207.28
  4. Step 4: Simplify right side
    572.56x = 178,012.06
  5. Step 5: Solve for x
    x = 178,012.06/572.56
  6. Step 6: Final answer
    x = 310.91

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.