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Finding the Fourth Proportional to 873,871.89, 1,311,122.45 and 305,336.64

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Solution

The fourth proportional to 873,871.89, 1,311,122.45 and 305,336.64 is: 458,114.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,871.89 : 1,311,122.45 = 305,336.64 : x
  2. Step 2: Convert to fraction form
    873,871.89/1,311,122.45 = 305,336.64/x
  3. Step 3: Cross multiply
    873,871.89x = 1,311,122.45 × 305,336.64
  4. Step 4: Simplify right side
    873,871.89x = 400,333,720,099.04
  5. Step 5: Solve for x
    x = 400,333,720,099.04/873,871.89
  6. Step 6: Final answer
    x = 458,114.88

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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.