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Finding the Fourth Proportional to 256,078.80, 384,118.20 and 165,877.20

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Solution

The fourth proportional to 256,078.80, 384,118.20 and 165,877.20 is: 248,815.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,078.80 : 384,118.20 = 165,877.20 : x
  2. Step 2: Convert to fraction form
    256,078.80/384,118.20 = 165,877.20/x
  3. Step 3: Cross multiply
    256,078.80x = 384,118.20 × 165,877.20
  4. Step 4: Simplify right side
    256,078.80x = 63,716,451,485.04
  5. Step 5: Solve for x
    x = 63,716,451,485.04/256,078.80
  6. Step 6: Final answer
    x = 248,815.80

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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.