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Finding the Fourth Proportional to 4,326.40, 6,489.60 and 1,728.64

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Solution

The fourth proportional to 4,326.40, 6,489.60 and 1,728.64 is: 2,592.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,326.40 : 6,489.60 = 1,728.64 : x
  2. Step 2: Convert to fraction form
    4,326.40/6,489.60 = 1,728.64/x
  3. Step 3: Cross multiply
    4,326.40x = 6,489.60 × 1,728.64
  4. Step 4: Simplify right side
    4,326.40x = 11,218,182.14
  5. Step 5: Solve for x
    x = 11,218,182.14/4,326.40
  6. Step 6: Final answer
    x = 2,592.96

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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.