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Finding the Fourth Proportional to 256,619.64, 384,798.02 and 136,744.90

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Solution

The fourth proportional to 256,619.64, 384,798.02 and 136,744.90 is: 205,047.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,619.64 : 384,798.02 = 136,744.90 : x
  2. Step 2: Convert to fraction form
    256,619.64/384,798.02 = 136,744.90/x
  3. Step 3: Cross multiply
    256,619.64x = 384,798.02 × 136,744.90
  4. Step 4: Simplify right side
    256,619.64x = 52,619,166,765.10
  5. Step 5: Solve for x
    x = 52,619,166,765.10/256,619.64
  6. Step 6: Final answer
    x = 205,047.31

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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.