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Finding the Fourth Proportional to 664,404.40, 995,512.20 and 383,431.60

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Solution

The fourth proportional to 664,404.40, 995,512.20 and 383,431.60 is: 574,515.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,404.40 : 995,512.20 = 383,431.60 : x
  2. Step 2: Convert to fraction form
    664,404.40/995,512.20 = 383,431.60/x
  3. Step 3: Cross multiply
    664,404.40x = 995,512.20 × 383,431.60
  4. Step 4: Simplify right side
    664,404.40x = 381,710,835,665.52
  5. Step 5: Solve for x
    x = 381,710,835,665.52/664,404.40
  6. Step 6: Final answer
    x = 574,515.82

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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.