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Finding the Fourth Proportional to 572.82, 859.38 and 312.75

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Solution

The fourth proportional to 572.82, 859.38 and 312.75 is: 469.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.82 : 859.38 = 312.75 : x
  2. Step 2: Convert to fraction form
    572.82/859.38 = 312.75/x
  3. Step 3: Cross multiply
    572.82x = 859.38 × 312.75
  4. Step 4: Simplify right side
    572.82x = 268,773.54
  5. Step 5: Solve for x
    x = 268,773.54/572.82
  6. Step 6: Final answer
    x = 469.21

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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.