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Finding the Fourth Proportional to 605.20, 839 and 572.36

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Solution

The fourth proportional to 605.20, 839 and 572.36 is: 793.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.20 : 839 = 572.36 : x
  2. Step 2: Convert to fraction form
    605.20/839 = 572.36/x
  3. Step 3: Cross multiply
    605.20x = 839 × 572.36
  4. Step 4: Simplify right side
    605.20x = 480,210.04
  5. Step 5: Solve for x
    x = 480,210.04/605.20
  6. Step 6: Final answer
    x = 793.47

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.