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Finding the Fourth Proportional to 481,123.80, 721,685.70 and 405,016.20

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Solution

The fourth proportional to 481,123.80, 721,685.70 and 405,016.20 is: 607,524.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,123.80 : 721,685.70 = 405,016.20 : x
  2. Step 2: Convert to fraction form
    481,123.80/721,685.70 = 405,016.20/x
  3. Step 3: Cross multiply
    481,123.80x = 721,685.70 × 405,016.20
  4. Step 4: Simplify right side
    481,123.80x = 292,294,399,808.34
  5. Step 5: Solve for x
    x = 292,294,399,808.34/481,123.80
  6. Step 6: Final answer
    x = 607,524.30

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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.