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Finding the Fourth Proportional to 256,675.77, 384,692.90 and 123,520.28

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Solution

The fourth proportional to 256,675.77, 384,692.90 and 123,520.28 is: 185,126.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,675.77 : 384,692.90 = 123,520.28 : x
  2. Step 2: Convert to fraction form
    256,675.77/384,692.90 = 123,520.28/x
  3. Step 3: Cross multiply
    256,675.77x = 384,692.90 × 123,520.28
  4. Step 4: Simplify right side
    256,675.77x = 47,517,372,180.95
  5. Step 5: Solve for x
    x = 47,517,372,180.95/256,675.77
  6. Step 6: Final answer
    x = 185,126.05

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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.