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Finding the Fourth Proportional to 513.38, 771.12 and 436.46

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Solution

The fourth proportional to 513.38, 771.12 and 436.46 is: 655.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.38 : 771.12 = 436.46 : x
  2. Step 2: Convert to fraction form
    513.38/771.12 = 436.46/x
  3. Step 3: Cross multiply
    513.38x = 771.12 × 436.46
  4. Step 4: Simplify right side
    513.38x = 336,563.04
  5. Step 5: Solve for x
    x = 336,563.04/513.38
  6. Step 6: Final answer
    x = 655.58

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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.