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Finding the Fourth Proportional to 939.24, 1,295.74 and 540.81

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Solution

The fourth proportional to 939.24, 1,295.74 and 540.81 is: 746.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.24 : 1,295.74 = 540.81 : x
  2. Step 2: Convert to fraction form
    939.24/1,295.74 = 540.81/x
  3. Step 3: Cross multiply
    939.24x = 1,295.74 × 540.81
  4. Step 4: Simplify right side
    939.24x = 700,749.15
  5. Step 5: Solve for x
    x = 700,749.15/939.24
  6. Step 6: Final answer
    x = 746.08

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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.