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Finding the Fourth Proportional to 5,393.91, 8,078.54 and 3,419.45

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Solution

The fourth proportional to 5,393.91, 8,078.54 and 3,419.45 is: 5,121.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,393.91 : 8,078.54 = 3,419.45 : x
  2. Step 2: Convert to fraction form
    5,393.91/8,078.54 = 3,419.45/x
  3. Step 3: Cross multiply
    5,393.91x = 8,078.54 × 3,419.45
  4. Step 4: Simplify right side
    5,393.91x = 27,624,106.11
  5. Step 5: Solve for x
    x = 27,624,106.11/5,393.91
  6. Step 6: Final answer
    x = 5,121.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.