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Finding the Fourth Proportional to 281,129.89, 387,686.82 and 238,106.14

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Solution

The fourth proportional to 281,129.89, 387,686.82 and 238,106.14 is: 328,355.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,129.89 : 387,686.82 = 238,106.14 : x
  2. Step 2: Convert to fraction form
    281,129.89/387,686.82 = 238,106.14/x
  3. Step 3: Cross multiply
    281,129.89x = 387,686.82 × 238,106.14
  4. Step 4: Simplify right side
    281,129.89x = 92,310,612,239.07
  5. Step 5: Solve for x
    x = 92,310,612,239.07/281,129.89
  6. Step 6: Final answer
    x = 328,355.74

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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.