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Finding the Fourth Proportional to 230,381.79, 317,928.36 and 128,413.73

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Solution

The fourth proportional to 230,381.79, 317,928.36 and 128,413.73 is: 177,211.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,381.79 : 317,928.36 = 128,413.73 : x
  2. Step 2: Convert to fraction form
    230,381.79/317,928.36 = 128,413.73/x
  3. Step 3: Cross multiply
    230,381.79x = 317,928.36 × 128,413.73
  4. Step 4: Simplify right side
    230,381.79x = 40,826,366,580.38
  5. Step 5: Solve for x
    x = 40,826,366,580.38/230,381.79
  6. Step 6: Final answer
    x = 177,211.78

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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.