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Finding the Fourth Proportional to 619.78, 854.95 and 546.28

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Solution

The fourth proportional to 619.78, 854.95 and 546.28 is: 753.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.78 : 854.95 = 546.28 : x
  2. Step 2: Convert to fraction form
    619.78/854.95 = 546.28/x
  3. Step 3: Cross multiply
    619.78x = 854.95 × 546.28
  4. Step 4: Simplify right side
    619.78x = 467,042.09
  5. Step 5: Solve for x
    x = 467,042.09/619.78
  6. Step 6: Final answer
    x = 753.56

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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.