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Finding the Fourth Proportional to 256,638.93, 384,958.59 and 69,650.43

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Solution

The fourth proportional to 256,638.93, 384,958.59 and 69,650.43 is: 104,475.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,638.93 : 384,958.59 = 69,650.43 : x
  2. Step 2: Convert to fraction form
    256,638.93/384,958.59 = 69,650.43/x
  3. Step 3: Cross multiply
    256,638.93x = 384,958.59 × 69,650.43
  4. Step 4: Simplify right side
    256,638.93x = 26,812,531,325.69
  5. Step 5: Solve for x
    x = 26,812,531,325.69/256,638.93
  6. Step 6: Final answer
    x = 104,475.70

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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.