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Finding the Fourth Proportional to 560.78, 773.02 and 394.54

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Solution

The fourth proportional to 560.78, 773.02 and 394.54 is: 543.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.78 : 773.02 = 394.54 : x
  2. Step 2: Convert to fraction form
    560.78/773.02 = 394.54/x
  3. Step 3: Cross multiply
    560.78x = 773.02 × 394.54
  4. Step 4: Simplify right side
    560.78x = 304,987.31
  5. Step 5: Solve for x
    x = 304,987.31/560.78
  6. Step 6: Final answer
    x = 543.86

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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.