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Finding the Fourth Proportional to 256,863.40, 385,287.90 and 116,621.80

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Solution

The fourth proportional to 256,863.40, 385,287.90 and 116,621.80 is: 174,929.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,863.40 : 385,287.90 = 116,621.80 : x
  2. Step 2: Convert to fraction form
    256,863.40/385,287.90 = 116,621.80/x
  3. Step 3: Cross multiply
    256,863.40x = 385,287.90 × 116,621.80
  4. Step 4: Simplify right side
    256,863.40x = 44,932,968,416.22
  5. Step 5: Solve for x
    x = 44,932,968,416.22/256,863.40
  6. Step 6: Final answer
    x = 174,929.43

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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.