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Finding the Fourth Proportional to 3,967.90, 5,478.38 and 3,546.91

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Solution

The fourth proportional to 3,967.90, 5,478.38 and 3,546.91 is: 4,897.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,967.90 : 5,478.38 = 3,546.91 : x
  2. Step 2: Convert to fraction form
    3,967.90/5,478.38 = 3,546.91/x
  3. Step 3: Cross multiply
    3,967.90x = 5,478.38 × 3,546.91
  4. Step 4: Simplify right side
    3,967.90x = 19,431,320.81
  5. Step 5: Solve for x
    x = 19,431,320.81/3,967.90
  6. Step 6: Final answer
    x = 4,897.13

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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.