Home / 256,724.20-385,086.30-172,743.40

Finding the Fourth Proportional to 256,724.20, 385,086.30 and 172,743.40

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Solution

The fourth proportional to 256,724.20, 385,086.30 and 172,743.40 is: 259,115.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,724.20 : 385,086.30 = 172,743.40 : x
  2. Step 2: Convert to fraction form
    256,724.20/385,086.30 = 172,743.40/x
  3. Step 3: Cross multiply
    256,724.20x = 385,086.30 × 172,743.40
  4. Step 4: Simplify right side
    256,724.20x = 66,521,116,755.42
  5. Step 5: Solve for x
    x = 66,521,116,755.42/256,724.20
  6. Step 6: Final answer
    x = 259,115.10

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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.