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Finding the Fourth Proportional to 485,321.90, 727,982.85 and 343,604.30

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Solution

The fourth proportional to 485,321.90, 727,982.85 and 343,604.30 is: 515,406.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,321.90 : 727,982.85 = 343,604.30 : x
  2. Step 2: Convert to fraction form
    485,321.90/727,982.85 = 343,604.30/x
  3. Step 3: Cross multiply
    485,321.90x = 727,982.85 × 343,604.30
  4. Step 4: Simplify right side
    485,321.90x = 250,138,037,586.26
  5. Step 5: Solve for x
    x = 250,138,037,586.26/485,321.90
  6. Step 6: Final answer
    x = 515,406.45

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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.