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Finding the Fourth Proportional to 481,209.20, 721,813.80 and 345,906.80

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Solution

The fourth proportional to 481,209.20, 721,813.80 and 345,906.80 is: 518,860.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,209.20 : 721,813.80 = 345,906.80 : x
  2. Step 2: Convert to fraction form
    481,209.20/721,813.80 = 345,906.80/x
  3. Step 3: Cross multiply
    481,209.20x = 721,813.80 × 345,906.80
  4. Step 4: Simplify right side
    481,209.20x = 249,680,301,753.84
  5. Step 5: Solve for x
    x = 249,680,301,753.84/481,209.20
  6. Step 6: Final answer
    x = 518,860.20

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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.