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Finding the Fourth Proportional to 256,768.12, 385,171.62 and 69,776.92

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Solution

The fourth proportional to 256,768.12, 385,171.62 and 69,776.92 is: 104,670.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,768.12 : 385,171.62 = 69,776.92 : x
  2. Step 2: Convert to fraction form
    256,768.12/385,171.62 = 69,776.92/x
  3. Step 3: Cross multiply
    256,768.12x = 385,171.62 × 69,776.92
  4. Step 4: Simplify right side
    256,768.12x = 26,876,089,315.01
  5. Step 5: Solve for x
    x = 26,876,089,315.01/256,768.12
  6. Step 6: Final answer
    x = 104,670.66

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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.