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Finding the Fourth Proportional to 572.08, 858.24 and 206.90

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Solution

The fourth proportional to 572.08, 858.24 and 206.90 is: 310.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.08 : 858.24 = 206.90 : x
  2. Step 2: Convert to fraction form
    572.08/858.24 = 206.90/x
  3. Step 3: Cross multiply
    572.08x = 858.24 × 206.90
  4. Step 4: Simplify right side
    572.08x = 177,569.86
  5. Step 5: Solve for x
    x = 177,569.86/572.08
  6. Step 6: Final answer
    x = 310.39

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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.