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Finding the Fourth Proportional to 486,047.80, 728,196.90 and 396,818.20

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Solution

The fourth proportional to 486,047.80, 728,196.90 and 396,818.20 is: 594,513.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,047.80 : 728,196.90 = 396,818.20 : x
  2. Step 2: Convert to fraction form
    486,047.80/728,196.90 = 396,818.20/x
  3. Step 3: Cross multiply
    486,047.80x = 728,196.90 × 396,818.20
  4. Step 4: Simplify right side
    486,047.80x = 288,961,783,103.58
  5. Step 5: Solve for x
    x = 288,961,783,103.58/486,047.80
  6. Step 6: Final answer
    x = 594,513.10

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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.