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Finding the Fourth Proportional to 5,393.27, 7,440.71 and 3,980.36

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Solution

The fourth proportional to 5,393.27, 7,440.71 and 3,980.36 is: 5,491.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,393.27 : 7,440.71 = 3,980.36 : x
  2. Step 2: Convert to fraction form
    5,393.27/7,440.71 = 3,980.36/x
  3. Step 3: Cross multiply
    5,393.27x = 7,440.71 × 3,980.36
  4. Step 4: Simplify right side
    5,393.27x = 29,616,647.35
  5. Step 5: Solve for x
    x = 29,616,647.35/5,393.27
  6. Step 6: Final answer
    x = 5,491.41

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.