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Finding the Fourth Proportional to 939.40, 1,296.38 and 541.10

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Solution

The fourth proportional to 939.40, 1,296.38 and 541.10 is: 746.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.40 : 1,296.38 = 541.10 : x
  2. Step 2: Convert to fraction form
    939.40/1,296.38 = 541.10/x
  3. Step 3: Cross multiply
    939.40x = 1,296.38 × 541.10
  4. Step 4: Simplify right side
    939.40x = 701,475.81
  5. Step 5: Solve for x
    x = 701,475.81/939.40
  6. Step 6: Final answer
    x = 746.73

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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.