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Finding the Fourth Proportional to 381,627.60, 572,725.80 and 145,431.60

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Solution

The fourth proportional to 381,627.60, 572,725.80 and 145,431.60 is: 218,255.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,627.60 : 572,725.80 = 145,431.60 : x
  2. Step 2: Convert to fraction form
    381,627.60/572,725.80 = 145,431.60/x
  3. Step 3: Cross multiply
    381,627.60x = 572,725.80 × 145,431.60
  4. Step 4: Simplify right side
    381,627.60x = 83,292,429,455.28
  5. Step 5: Solve for x
    x = 83,292,429,455.28/381,627.60
  6. Step 6: Final answer
    x = 218,255.78

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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.