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Finding the Fourth Proportional to 939.37, 1,408.10 and 610.52

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Solution

The fourth proportional to 939.37, 1,408.10 and 610.52 is: 915.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.37 : 1,408.10 = 610.52 : x
  2. Step 2: Convert to fraction form
    939.37/1,408.10 = 610.52/x
  3. Step 3: Cross multiply
    939.37x = 1,408.10 × 610.52
  4. Step 4: Simplify right side
    939.37x = 859,673.21
  5. Step 5: Solve for x
    x = 859,673.21/939.37
  6. Step 6: Final answer
    x = 915.16

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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.