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Finding the Fourth Proportional to 572.60, 859.91 and 426.39

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Solution

The fourth proportional to 572.60, 859.91 and 426.39 is: 640.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.60 : 859.91 = 426.39 : x
  2. Step 2: Convert to fraction form
    572.60/859.91 = 426.39/x
  3. Step 3: Cross multiply
    572.60x = 859.91 × 426.39
  4. Step 4: Simplify right side
    572.60x = 366,654.89
  5. Step 5: Solve for x
    x = 366,654.89/572.60
  6. Step 6: Final answer
    x = 640.34

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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.