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Finding the Fourth Proportional to 270,659.60, 405,989.40 and 256,144.40

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Solution

The fourth proportional to 270,659.60, 405,989.40 and 256,144.40 is: 384,216.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,659.60 : 405,989.40 = 256,144.40 : x
  2. Step 2: Convert to fraction form
    270,659.60/405,989.40 = 256,144.40/x
  3. Step 3: Cross multiply
    270,659.60x = 405,989.40 × 256,144.40
  4. Step 4: Simplify right side
    270,659.60x = 103,991,911,269.36
  5. Step 5: Solve for x
    x = 103,991,911,269.36/270,659.60
  6. Step 6: Final answer
    x = 384,216.60

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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.