Home / 256,512.40-384,331.20-211,897.60

Finding the Fourth Proportional to 256,512.40, 384,331.20 and 211,897.60

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Solution

The fourth proportional to 256,512.40, 384,331.20 and 211,897.60 is: 317,485.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,512.40 : 384,331.20 = 211,897.60 : x
  2. Step 2: Convert to fraction form
    256,512.40/384,331.20 = 211,897.60/x
  3. Step 3: Cross multiply
    256,512.40x = 384,331.20 × 211,897.60
  4. Step 4: Simplify right side
    256,512.40x = 81,438,858,885.12
  5. Step 5: Solve for x
    x = 81,438,858,885.12/256,512.40
  6. Step 6: Final answer
    x = 317,485.08

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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.