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Finding the Fourth Proportional to 6,409.79, 8,844.75 and 3,720.38

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Solution

The fourth proportional to 6,409.79, 8,844.75 and 3,720.38 is: 5,133.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,409.79 : 8,844.75 = 3,720.38 : x
  2. Step 2: Convert to fraction form
    6,409.79/8,844.75 = 3,720.38/x
  3. Step 3: Cross multiply
    6,409.79x = 8,844.75 × 3,720.38
  4. Step 4: Simplify right side
    6,409.79x = 32,905,853.12
  5. Step 5: Solve for x
    x = 32,905,853.12/6,409.79
  6. Step 6: Final answer
    x = 5,133.69

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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.