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Finding the Fourth Proportional to 861,155.62, 1,188,725.43 and 646,917.10

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Solution

The fourth proportional to 861,155.62, 1,188,725.43 and 646,917.10 is: 892,994.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,155.62 : 1,188,725.43 = 646,917.10 : x
  2. Step 2: Convert to fraction form
    861,155.62/1,188,725.43 = 646,917.10/x
  3. Step 3: Cross multiply
    861,155.62x = 1,188,725.43 × 646,917.10
  4. Step 4: Simplify right side
    861,155.62x = 769,006,807,871.85
  5. Step 5: Solve for x
    x = 769,006,807,871.85/861,155.62
  6. Step 6: Final answer
    x = 892,994.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.