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Finding the Fourth Proportional to 455,207.70, 682,811.55 and 289,729.30

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Solution

The fourth proportional to 455,207.70, 682,811.55 and 289,729.30 is: 434,593.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,207.70 : 682,811.55 = 289,729.30 : x
  2. Step 2: Convert to fraction form
    455,207.70/682,811.55 = 289,729.30/x
  3. Step 3: Cross multiply
    455,207.70x = 682,811.55 × 289,729.30
  4. Step 4: Simplify right side
    455,207.70x = 197,830,512,413.42
  5. Step 5: Solve for x
    x = 197,830,512,413.42/455,207.70
  6. Step 6: Final answer
    x = 434,593.95

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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.