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Finding the Fourth Proportional to 828,778.80, 1,242,001.80 and 613,869.60

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Solution

The fourth proportional to 828,778.80, 1,242,001.80 and 613,869.60 is: 919,940.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,778.80 : 1,242,001.80 = 613,869.60 : x
  2. Step 2: Convert to fraction form
    828,778.80/1,242,001.80 = 613,869.60/x
  3. Step 3: Cross multiply
    828,778.80x = 1,242,001.80 × 613,869.60
  4. Step 4: Simplify right side
    828,778.80x = 762,427,148,165.28
  5. Step 5: Solve for x
    x = 762,427,148,165.28/828,778.80
  6. Step 6: Final answer
    x = 919,940.46

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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.