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Finding the Fourth Proportional to 828,992.80, 1,243,489.20 and 577,050.40

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Solution

The fourth proportional to 828,992.80, 1,243,489.20 and 577,050.40 is: 865,575.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,992.80 : 1,243,489.20 = 577,050.40 : x
  2. Step 2: Convert to fraction form
    828,992.80/1,243,489.20 = 577,050.40/x
  3. Step 3: Cross multiply
    828,992.80x = 1,243,489.20 × 577,050.40
  4. Step 4: Simplify right side
    828,992.80x = 717,555,940,255.68
  5. Step 5: Solve for x
    x = 717,555,940,255.68/828,992.80
  6. Step 6: Final answer
    x = 865,575.60

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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.