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Finding the Fourth Proportional to 505,897.20, 758,845.80 and 131,920.20

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Solution

The fourth proportional to 505,897.20, 758,845.80 and 131,920.20 is: 197,880.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,897.20 : 758,845.80 = 131,920.20 : x
  2. Step 2: Convert to fraction form
    505,897.20/758,845.80 = 131,920.20/x
  3. Step 3: Cross multiply
    505,897.20x = 758,845.80 × 131,920.20
  4. Step 4: Simplify right side
    505,897.20x = 100,107,089,705.16
  5. Step 5: Solve for x
    x = 100,107,089,705.16/505,897.20
  6. Step 6: Final answer
    x = 197,880.30

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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.