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Finding the Fourth Proportional to 515,416.80, 773,125.20 and 263,474.40

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Solution

The fourth proportional to 515,416.80, 773,125.20 and 263,474.40 is: 395,211.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,416.80 : 773,125.20 = 263,474.40 : x
  2. Step 2: Convert to fraction form
    515,416.80/773,125.20 = 263,474.40/x
  3. Step 3: Cross multiply
    515,416.80x = 773,125.20 × 263,474.40
  4. Step 4: Simplify right side
    515,416.80x = 203,698,698,194.88
  5. Step 5: Solve for x
    x = 203,698,698,194.88/515,416.80
  6. Step 6: Final answer
    x = 395,211.60

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Double scale
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Similar ratio
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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.