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Finding the Fourth Proportional to 288,043.60, 431,190.60 and 256,550.80

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Solution

The fourth proportional to 288,043.60, 431,190.60 and 256,550.80 is: 384,047.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,043.60 : 431,190.60 = 256,550.80 : x
  2. Step 2: Convert to fraction form
    288,043.60/431,190.60 = 256,550.80/x
  3. Step 3: Cross multiply
    288,043.60x = 431,190.60 × 256,550.80
  4. Step 4: Simplify right side
    288,043.60x = 110,622,293,382.48
  5. Step 5: Solve for x
    x = 110,622,293,382.48/288,043.60
  6. Step 6: Final answer
    x = 384,047.04

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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.