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Finding the Fourth Proportional to 513,872.40, 770,808.60 and 505,999.20

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Solution

The fourth proportional to 513,872.40, 770,808.60 and 505,999.20 is: 758,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,872.40 : 770,808.60 = 505,999.20 : x
  2. Step 2: Convert to fraction form
    513,872.40/770,808.60 = 505,999.20/x
  3. Step 3: Cross multiply
    513,872.40x = 770,808.60 × 505,999.20
  4. Step 4: Simplify right side
    513,872.40x = 390,028,534,953.12
  5. Step 5: Solve for x
    x = 390,028,534,953.12/513,872.40
  6. Step 6: Final answer
    x = 758,998.80

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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.