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Finding the Fourth Proportional to 6,640.60, 9,619.15 and 6,640.60

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Solution

The fourth proportional to 6,640.60, 9,619.15 and 6,640.60 is: 9,619.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.60 : 9,619.15 = 6,640.60 : x
  2. Step 2: Convert to fraction form
    6,640.60/9,619.15 = 6,640.60/x
  3. Step 3: Cross multiply
    6,640.60x = 9,619.15 × 6,640.60
  4. Step 4: Simplify right side
    6,640.60x = 63,876,927.49
  5. Step 5: Solve for x
    x = 63,876,927.49/6,640.60
  6. Step 6: Final answer
    x = 9,619.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.