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Finding the Fourth Proportional to 556.56, 835.71 and 513.75

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Solution

The fourth proportional to 556.56, 835.71 and 513.75 is: 771.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.56 : 835.71 = 513.75 : x
  2. Step 2: Convert to fraction form
    556.56/835.71 = 513.75/x
  3. Step 3: Cross multiply
    556.56x = 835.71 × 513.75
  4. Step 4: Simplify right side
    556.56x = 429,346.01
  5. Step 5: Solve for x
    x = 429,346.01/556.56
  6. Step 6: Final answer
    x = 771.43

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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.