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Finding the Fourth Proportional to 939.08, 1,295.72 and 540.72

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Solution

The fourth proportional to 939.08, 1,295.72 and 540.72 is: 746.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.08 : 1,295.72 = 540.72 : x
  2. Step 2: Convert to fraction form
    939.08/1,295.72 = 540.72/x
  3. Step 3: Cross multiply
    939.08x = 1,295.72 × 540.72
  4. Step 4: Simplify right side
    939.08x = 700,621.72
  5. Step 5: Solve for x
    x = 700,621.72/939.08
  6. Step 6: Final answer
    x = 746.07

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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.