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Finding the Fourth Proportional to 256,815.20, 385,660.20 and 168,460.40

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Solution

The fourth proportional to 256,815.20, 385,660.20 and 168,460.40 is: 252,977.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,815.20 : 385,660.20 = 168,460.40 : x
  2. Step 2: Convert to fraction form
    256,815.20/385,660.20 = 168,460.40/x
  3. Step 3: Cross multiply
    256,815.20x = 385,660.20 × 168,460.40
  4. Step 4: Simplify right side
    256,815.20x = 64,968,471,556.08
  5. Step 5: Solve for x
    x = 64,968,471,556.08/256,815.20
  6. Step 6: Final answer
    x = 252,977.52

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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.