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Finding the Fourth Proportional to 228,847, 315,808.86 and 128,277.40

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Solution

The fourth proportional to 228,847, 315,808.86 and 128,277.40 is: 177,022.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,847 : 315,808.86 = 128,277.40 : x
  2. Step 2: Convert to fraction form
    228,847/315,808.86 = 128,277.40/x
  3. Step 3: Cross multiply
    228,847x = 315,808.86 × 128,277.40
  4. Step 4: Simplify right side
    228,847x = 40,511,139,457.76
  5. Step 5: Solve for x
    x = 40,511,139,457.76/228,847
  6. Step 6: Final answer
    x = 177,022.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.