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Finding the Fourth Proportional to 605.16, 836.26 and 515.39

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Solution

The fourth proportional to 605.16, 836.26 and 515.39 is: 712.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.16 : 836.26 = 515.39 : x
  2. Step 2: Convert to fraction form
    605.16/836.26 = 515.39/x
  3. Step 3: Cross multiply
    605.16x = 836.26 × 515.39
  4. Step 4: Simplify right side
    605.16x = 430,999.10
  5. Step 5: Solve for x
    x = 430,999.10/605.16
  6. Step 6: Final answer
    x = 712.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.