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Finding the Fourth Proportional to 256,139.80, 359,120.60 and 256,139.80

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Solution

The fourth proportional to 256,139.80, 359,120.60 and 256,139.80 is: 359,120.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,139.80 : 359,120.60 = 256,139.80 : x
  2. Step 2: Convert to fraction form
    256,139.80/359,120.60 = 256,139.80/x
  3. Step 3: Cross multiply
    256,139.80x = 359,120.60 × 256,139.80
  4. Step 4: Simplify right side
    256,139.80x = 91,985,078,659.88
  5. Step 5: Solve for x
    x = 91,985,078,659.88/256,139.80
  6. Step 6: Final answer
    x = 359,120.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.