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Finding the Fourth Proportional to 508,278.76, 701,419.62 and 281,918.44

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Solution

The fourth proportional to 508,278.76, 701,419.62 and 281,918.44 is: 389,044.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,278.76 : 701,419.62 = 281,918.44 : x
  2. Step 2: Convert to fraction form
    508,278.76/701,419.62 = 281,918.44/x
  3. Step 3: Cross multiply
    508,278.76x = 701,419.62 × 281,918.44
  4. Step 4: Simplify right side
    508,278.76x = 197,743,125,055.79
  5. Step 5: Solve for x
    x = 197,743,125,055.79/508,278.76
  6. Step 6: Final answer
    x = 389,044.64

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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.