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Finding the Fourth Proportional to 610.56, 916.38 and 378.72

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Solution

The fourth proportional to 610.56, 916.38 and 378.72 is: 568.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.56 : 916.38 = 378.72 : x
  2. Step 2: Convert to fraction form
    610.56/916.38 = 378.72/x
  3. Step 3: Cross multiply
    610.56x = 916.38 × 378.72
  4. Step 4: Simplify right side
    610.56x = 347,051.43
  5. Step 5: Solve for x
    x = 347,051.43/610.56
  6. Step 6: Final answer
    x = 568.41

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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.