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Finding the Fourth Proportional to 572.20, 858.31 and 187.45

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Solution

The fourth proportional to 572.20, 858.31 and 187.45 is: 281.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.20 : 858.31 = 187.45 : x
  2. Step 2: Convert to fraction form
    572.20/858.31 = 187.45/x
  3. Step 3: Cross multiply
    572.20x = 858.31 × 187.45
  4. Step 4: Simplify right side
    572.20x = 160,887.60
  5. Step 5: Solve for x
    x = 160,887.60/572.20
  6. Step 6: Final answer
    x = 281.17

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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.