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Finding the Fourth Proportional to 253,617.93, 380,485.23 and 76,128.30

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Solution

The fourth proportional to 253,617.93, 380,485.23 and 76,128.30 is: 114,209.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,617.93 : 380,485.23 = 76,128.30 : x
  2. Step 2: Convert to fraction form
    253,617.93/380,485.23 = 76,128.30/x
  3. Step 3: Cross multiply
    253,617.93x = 380,485.23 × 76,128.30
  4. Step 4: Simplify right side
    253,617.93x = 28,965,693,735.01
  5. Step 5: Solve for x
    x = 28,965,693,735.01/253,617.93
  6. Step 6: Final answer
    x = 114,209.96

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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.