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Finding the Fourth Proportional to 207,640.60, 311,345.70 and 82,840.60

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Solution

The fourth proportional to 207,640.60, 311,345.70 and 82,840.60 is: 124,214.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,640.60 : 311,345.70 = 82,840.60 : x
  2. Step 2: Convert to fraction form
    207,640.60/311,345.70 = 82,840.60/x
  3. Step 3: Cross multiply
    207,640.60x = 311,345.70 × 82,840.60
  4. Step 4: Simplify right side
    207,640.60x = 25,792,064,595.42
  5. Step 5: Solve for x
    x = 25,792,064,595.42/207,640.60
  6. Step 6: Final answer
    x = 124,214.94

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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.