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Finding the Fourth Proportional to 556.66, 768.13 and 461.31

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Solution

The fourth proportional to 556.66, 768.13 and 461.31 is: 636.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.66 : 768.13 = 461.31 : x
  2. Step 2: Convert to fraction form
    556.66/768.13 = 461.31/x
  3. Step 3: Cross multiply
    556.66x = 768.13 × 461.31
  4. Step 4: Simplify right side
    556.66x = 354,346.05
  5. Step 5: Solve for x
    x = 354,346.05/556.66
  6. Step 6: Final answer
    x = 636.56

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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.