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Finding the Fourth Proportional to 611.78, 916.59 and 544.82

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Solution

The fourth proportional to 611.78, 916.59 and 544.82 is: 816.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.78 : 916.59 = 544.82 : x
  2. Step 2: Convert to fraction form
    611.78/916.59 = 544.82/x
  3. Step 3: Cross multiply
    611.78x = 916.59 × 544.82
  4. Step 4: Simplify right side
    611.78x = 499,376.56
  5. Step 5: Solve for x
    x = 499,376.56/611.78
  6. Step 6: Final answer
    x = 816.27

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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.