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Finding the Fourth Proportional to 461,313.20, 691,969.80 and 212,481.20

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Solution

The fourth proportional to 461,313.20, 691,969.80 and 212,481.20 is: 318,721.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,313.20 : 691,969.80 = 212,481.20 : x
  2. Step 2: Convert to fraction form
    461,313.20/691,969.80 = 212,481.20/x
  3. Step 3: Cross multiply
    461,313.20x = 691,969.80 × 212,481.20
  4. Step 4: Simplify right side
    461,313.20x = 147,030,573,467.76
  5. Step 5: Solve for x
    x = 147,030,573,467.76/461,313.20
  6. Step 6: Final answer
    x = 318,721.80

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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.