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Finding the Fourth Proportional to 256,685.70, 384,692.29 and 123,300.57

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Solution

The fourth proportional to 256,685.70, 384,692.29 and 123,300.57 is: 184,789.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,685.70 : 384,692.29 = 123,300.57 : x
  2. Step 2: Convert to fraction form
    256,685.70/384,692.29 = 123,300.57/x
  3. Step 3: Cross multiply
    256,685.70x = 384,692.29 × 123,300.57
  4. Step 4: Simplify right side
    256,685.70x = 47,432,778,323.35
  5. Step 5: Solve for x
    x = 47,432,778,323.35/256,685.70
  6. Step 6: Final answer
    x = 184,789.33

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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.