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Finding the Fourth Proportional to 256,413.80, 384,620.70 and 123,553.55

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Solution

The fourth proportional to 256,413.80, 384,620.70 and 123,553.55 is: 185,330.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,413.80 : 384,620.70 = 123,553.55 : x
  2. Step 2: Convert to fraction form
    256,413.80/384,620.70 = 123,553.55/x
  3. Step 3: Cross multiply
    256,413.80x = 384,620.70 × 123,553.55
  4. Step 4: Simplify right side
    256,413.80x = 47,521,252,888.49
  5. Step 5: Solve for x
    x = 47,521,252,888.49/256,413.80
  6. Step 6: Final answer
    x = 185,330.33

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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.