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Finding the Fourth Proportional to 256,964.80, 385,389.60 and 168,836.80

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Solution

The fourth proportional to 256,964.80, 385,389.60 and 168,836.80 is: 253,217.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,964.80 : 385,389.60 = 168,836.80 : x
  2. Step 2: Convert to fraction form
    256,964.80/385,389.60 = 168,836.80/x
  3. Step 3: Cross multiply
    256,964.80x = 385,389.60 × 168,836.80
  4. Step 4: Simplify right side
    256,964.80x = 65,067,946,817.28
  5. Step 5: Solve for x
    x = 65,067,946,817.28/256,964.80
  6. Step 6: Final answer
    x = 253,217.35

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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.