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Finding the Fourth Proportional to 513,319.60, 769,104.60 and 438,086.80

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Solution

The fourth proportional to 513,319.60, 769,104.60 and 438,086.80 is: 656,383.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,319.60 : 769,104.60 = 438,086.80 : x
  2. Step 2: Convert to fraction form
    513,319.60/769,104.60 = 438,086.80/x
  3. Step 3: Cross multiply
    513,319.60x = 769,104.60 × 438,086.80
  4. Step 4: Simplify right side
    513,319.60x = 336,934,573,079.28
  5. Step 5: Solve for x
    x = 336,934,573,079.28/513,319.60
  6. Step 6: Final answer
    x = 656,383.61

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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.