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Finding the Fourth Proportional to 455,413.70, 683,120.55 and 218,699.30

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Solution

The fourth proportional to 455,413.70, 683,120.55 and 218,699.30 is: 328,048.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,413.70 : 683,120.55 = 218,699.30 : x
  2. Step 2: Convert to fraction form
    455,413.70/683,120.55 = 218,699.30/x
  3. Step 3: Cross multiply
    455,413.70x = 683,120.55 × 218,699.30
  4. Step 4: Simplify right side
    455,413.70x = 149,397,986,100.62
  5. Step 5: Solve for x
    x = 149,397,986,100.62/455,413.70
  6. Step 6: Final answer
    x = 328,048.95

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Similar ratio
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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.