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Finding the Fourth Proportional to 399,989.21, 552,124.02 and 230,290.97

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Solution

The fourth proportional to 399,989.21, 552,124.02 and 230,290.97 is: 317,881.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,989.21 : 552,124.02 = 230,290.97 : x
  2. Step 2: Convert to fraction form
    399,989.21/552,124.02 = 230,290.97/x
  3. Step 3: Cross multiply
    399,989.21x = 552,124.02 × 230,290.97
  4. Step 4: Simplify right side
    399,989.21x = 127,149,173,365.48
  5. Step 5: Solve for x
    x = 127,149,173,365.48/399,989.21
  6. Step 6: Final answer
    x = 317,881.51

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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.