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Finding the Fourth Proportional to 253,899.92, 380,379 and 127,391.60

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Solution

The fourth proportional to 253,899.92, 380,379 and 127,391.60 is: 190,851.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,899.92 : 380,379 = 127,391.60 : x
  2. Step 2: Convert to fraction form
    253,899.92/380,379 = 127,391.60/x
  3. Step 3: Cross multiply
    253,899.92x = 380,379 × 127,391.60
  4. Step 4: Simplify right side
    253,899.92x = 48,457,089,416.40
  5. Step 5: Solve for x
    x = 48,457,089,416.40/253,899.92
  6. Step 6: Final answer
    x = 190,851.14

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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.