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Finding the Fourth Proportional to 455,280.40, 682,920.60 and 206,448.40

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Solution

The fourth proportional to 455,280.40, 682,920.60 and 206,448.40 is: 309,672.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,280.40 : 682,920.60 = 206,448.40 : x
  2. Step 2: Convert to fraction form
    455,280.40/682,920.60 = 206,448.40/x
  3. Step 3: Cross multiply
    455,280.40x = 682,920.60 × 206,448.40
  4. Step 4: Simplify right side
    455,280.40x = 140,987,865,197.04
  5. Step 5: Solve for x
    x = 140,987,865,197.04/455,280.40
  6. Step 6: Final answer
    x = 309,672.60

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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.