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Finding the Fourth Proportional to 253,712.58, 380,538.60 and 66,738.66

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Solution

The fourth proportional to 253,712.58, 380,538.60 and 66,738.66 is: 100,100.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,712.58 : 380,538.60 = 66,738.66 : x
  2. Step 2: Convert to fraction form
    253,712.58/380,538.60 = 66,738.66/x
  3. Step 3: Cross multiply
    253,712.58x = 380,538.60 × 66,738.66
  4. Step 4: Simplify right side
    253,712.58x = 25,396,636,242.28
  5. Step 5: Solve for x
    x = 25,396,636,242.28/253,712.58
  6. Step 6: Final answer
    x = 100,100.03

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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.