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Finding the Fourth Proportional to 399,268.56, 550,334 and 283,020.96

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Solution

The fourth proportional to 399,268.56, 550,334 and 283,020.96 is: 390,103.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,268.56 : 550,334 = 283,020.96 : x
  2. Step 2: Convert to fraction form
    399,268.56/550,334 = 283,020.96/x
  3. Step 3: Cross multiply
    399,268.56x = 550,334 × 283,020.96
  4. Step 4: Simplify right side
    399,268.56x = 155,756,057,000.64
  5. Step 5: Solve for x
    x = 155,756,057,000.64/399,268.56
  6. Step 6: Final answer
    x = 390,103.49

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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.