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Finding the Fourth Proportional to 455,515.70, 683,273.55 and 431,021.30

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Solution

The fourth proportional to 455,515.70, 683,273.55 and 431,021.30 is: 646,531.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,515.70 : 683,273.55 = 431,021.30 : x
  2. Step 2: Convert to fraction form
    455,515.70/683,273.55 = 431,021.30/x
  3. Step 3: Cross multiply
    455,515.70x = 683,273.55 × 431,021.30
  4. Step 4: Simplify right side
    455,515.70x = 294,505,453,776.62
  5. Step 5: Solve for x
    x = 294,505,453,776.62/455,515.70
  6. Step 6: Final answer
    x = 646,531.95

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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.