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Finding the Fourth Proportional to 228,950.25, 315,951.35 and 128,348.25

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Solution

The fourth proportional to 228,950.25, 315,951.35 and 128,348.25 is: 177,120.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,950.25 : 315,951.35 = 128,348.25 : x
  2. Step 2: Convert to fraction form
    228,950.25/315,951.35 = 128,348.25/x
  3. Step 3: Cross multiply
    228,950.25x = 315,951.35 × 128,348.25
  4. Step 4: Simplify right side
    228,950.25x = 40,551,802,215.90
  5. Step 5: Solve for x
    x = 40,551,802,215.90/228,950.25
  6. Step 6: Final answer
    x = 177,120.59

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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.