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Finding the Fourth Proportional to 207,285.70, 311,110.80 and 122,940.40

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Solution

The fourth proportional to 207,285.70, 311,110.80 and 122,940.40 is: 184,518.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,285.70 : 311,110.80 = 122,940.40 : x
  2. Step 2: Convert to fraction form
    207,285.70/311,110.80 = 122,940.40/x
  3. Step 3: Cross multiply
    207,285.70x = 311,110.80 × 122,940.40
  4. Step 4: Simplify right side
    207,285.70x = 38,248,086,196.32
  5. Step 5: Solve for x
    x = 38,248,086,196.32/207,285.70
  6. Step 6: Final answer
    x = 184,518.69

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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.