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Finding the Fourth Proportional to 572.02, 857.51 and 206.72

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Solution

The fourth proportional to 572.02, 857.51 and 206.72 is: 309.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.02 : 857.51 = 206.72 : x
  2. Step 2: Convert to fraction form
    572.02/857.51 = 206.72/x
  3. Step 3: Cross multiply
    572.02x = 857.51 × 206.72
  4. Step 4: Simplify right side
    572.02x = 177,267.13
  5. Step 5: Solve for x
    x = 177,267.13/572.02
  6. Step 6: Final answer
    x = 309.90

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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.