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Finding the Fourth Proportional to 256,136.74, 384,475.65 and 143,912.86

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Solution

The fourth proportional to 256,136.74, 384,475.65 and 143,912.86 is: 216,021.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,136.74 : 384,475.65 = 143,912.86 : x
  2. Step 2: Convert to fraction form
    256,136.74/384,475.65 = 143,912.86/x
  3. Step 3: Cross multiply
    256,136.74x = 384,475.65 × 143,912.86
  4. Step 4: Simplify right side
    256,136.74x = 55,330,990,391.86
  5. Step 5: Solve for x
    x = 55,330,990,391.86/256,136.74
  6. Step 6: Final answer
    x = 216,021.30

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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.