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Finding the Fourth Proportional to 511,312.80, 766,969.20 and 231,376.80

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Solution

The fourth proportional to 511,312.80, 766,969.20 and 231,376.80 is: 347,065.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,312.80 : 766,969.20 = 231,376.80 : x
  2. Step 2: Convert to fraction form
    511,312.80/766,969.20 = 231,376.80/x
  3. Step 3: Cross multiply
    511,312.80x = 766,969.20 × 231,376.80
  4. Step 4: Simplify right side
    511,312.80x = 177,458,879,194.56
  5. Step 5: Solve for x
    x = 177,458,879,194.56/511,312.80
  6. Step 6: Final answer
    x = 347,065.20

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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.