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Finding the Fourth Proportional to 6,446.40, 9,655.20 and 5,150.40

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Solution

The fourth proportional to 6,446.40, 9,655.20 and 5,150.40 is: 7,714.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,446.40 : 9,655.20 = 5,150.40 : x
  2. Step 2: Convert to fraction form
    6,446.40/9,655.20 = 5,150.40/x
  3. Step 3: Cross multiply
    6,446.40x = 9,655.20 × 5,150.40
  4. Step 4: Simplify right side
    6,446.40x = 49,728,142.08
  5. Step 5: Solve for x
    x = 49,728,142.08/6,446.40
  6. Step 6: Final answer
    x = 7,714.10

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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.