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Finding the Fourth Proportional to 256,435.40, 384,134.70 and 172,454.60

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Solution

The fourth proportional to 256,435.40, 384,134.70 and 172,454.60 is: 258,333.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,435.40 : 384,134.70 = 172,454.60 : x
  2. Step 2: Convert to fraction form
    256,435.40/384,134.70 = 172,454.60/x
  3. Step 3: Cross multiply
    256,435.40x = 384,134.70 × 172,454.60
  4. Step 4: Simplify right side
    256,435.40x = 66,245,796,034.62
  5. Step 5: Solve for x
    x = 66,245,796,034.62/256,435.40
  6. Step 6: Final answer
    x = 258,333.27

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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.