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Finding the Fourth Proportional to 664.41, 916.53 and 617.52

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Solution

The fourth proportional to 664.41, 916.53 and 617.52 is: 851.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.41 : 916.53 = 617.52 : x
  2. Step 2: Convert to fraction form
    664.41/916.53 = 617.52/x
  3. Step 3: Cross multiply
    664.41x = 916.53 × 617.52
  4. Step 4: Simplify right side
    664.41x = 565,975.61
  5. Step 5: Solve for x
    x = 565,975.61/664.41
  6. Step 6: Final answer
    x = 851.85

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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.