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Finding the Fourth Proportional to 256,424.40, 384,118.20 and 172,443.60

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Solution

The fourth proportional to 256,424.40, 384,118.20 and 172,443.60 is: 258,316.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,424.40 : 384,118.20 = 172,443.60 : x
  2. Step 2: Convert to fraction form
    256,424.40/384,118.20 = 172,443.60/x
  3. Step 3: Cross multiply
    256,424.40x = 384,118.20 × 172,443.60
  4. Step 4: Simplify right side
    256,424.40x = 66,238,725,233.52
  5. Step 5: Solve for x
    x = 66,238,725,233.52/256,424.40
  6. Step 6: Final answer
    x = 258,316.78

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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.