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Finding the Fourth Proportional to 399,083.04, 550,288.08 and 326,258.64

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Solution

The fourth proportional to 399,083.04, 550,288.08 and 326,258.64 is: 449,871.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,083.04 : 550,288.08 = 326,258.64 : x
  2. Step 2: Convert to fraction form
    399,083.04/550,288.08 = 326,258.64/x
  3. Step 3: Cross multiply
    399,083.04x = 550,288.08 × 326,258.64
  4. Step 4: Simplify right side
    399,083.04x = 179,536,240,589.01
  5. Step 5: Solve for x
    x = 179,536,240,589.01/399,083.04
  6. Step 6: Final answer
    x = 449,871.89

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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.