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Finding the Fourth Proportional to 270,653.60, 405,980.40 and 256,138.40

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Solution

The fourth proportional to 270,653.60, 405,980.40 and 256,138.40 is: 384,207.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,653.60 : 405,980.40 = 256,138.40 : x
  2. Step 2: Convert to fraction form
    270,653.60/405,980.40 = 256,138.40/x
  3. Step 3: Cross multiply
    270,653.60x = 405,980.40 × 256,138.40
  4. Step 4: Simplify right side
    270,653.60x = 103,987,170,087.36
  5. Step 5: Solve for x
    x = 103,987,170,087.36/270,653.60
  6. Step 6: Final answer
    x = 384,207.60

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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.