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Finding the Fourth Proportional to 3,128.70, 4,693.29 and 937.26

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Solution

The fourth proportional to 3,128.70, 4,693.29 and 937.26 is: 1,405.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.70 : 4,693.29 = 937.26 : x
  2. Step 2: Convert to fraction form
    3,128.70/4,693.29 = 937.26/x
  3. Step 3: Cross multiply
    3,128.70x = 4,693.29 × 937.26
  4. Step 4: Simplify right side
    3,128.70x = 4,398,832.99
  5. Step 5: Solve for x
    x = 4,398,832.99/3,128.70
  6. Step 6: Final answer
    x = 1,405.96

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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.