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Finding the Fourth Proportional to 485,786.90, 728,680.35 and 476,455.70

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Solution

The fourth proportional to 485,786.90, 728,680.35 and 476,455.70 is: 714,683.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,786.90 : 728,680.35 = 476,455.70 : x
  2. Step 2: Convert to fraction form
    485,786.90/728,680.35 = 476,455.70/x
  3. Step 3: Cross multiply
    485,786.90x = 728,680.35 × 476,455.70
  4. Step 4: Simplify right side
    485,786.90x = 347,183,906,235.50
  5. Step 5: Solve for x
    x = 347,183,906,235.50/485,786.90
  6. Step 6: Final answer
    x = 714,683.55

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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.