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Finding the Fourth Proportional to 256,859.60, 385,289.40 and 132,443.60

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Solution

The fourth proportional to 256,859.60, 385,289.40 and 132,443.60 is: 198,665.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,859.60 : 385,289.40 = 132,443.60 : x
  2. Step 2: Convert to fraction form
    256,859.60/385,289.40 = 132,443.60/x
  3. Step 3: Cross multiply
    256,859.60x = 385,289.40 × 132,443.60
  4. Step 4: Simplify right side
    256,859.60x = 51,029,115,177.84
  5. Step 5: Solve for x
    x = 51,029,115,177.84/256,859.60
  6. Step 6: Final answer
    x = 198,665.40

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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.