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Finding the Fourth Proportional to 572.11, 859.75 and 558.21

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Solution

The fourth proportional to 572.11, 859.75 and 558.21 is: 838.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.11 : 859.75 = 558.21 : x
  2. Step 2: Convert to fraction form
    572.11/859.75 = 558.21/x
  3. Step 3: Cross multiply
    572.11x = 859.75 × 558.21
  4. Step 4: Simplify right side
    572.11x = 479,922.88
  5. Step 5: Solve for x
    x = 479,922.88/572.11
  6. Step 6: Final answer
    x = 838.87

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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.