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Finding the Fourth Proportional to 283,067.95, 390,639.72 and 155,743.78

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Solution

The fourth proportional to 283,067.95, 390,639.72 and 155,743.78 is: 214,929.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,067.95 : 390,639.72 = 155,743.78 : x
  2. Step 2: Convert to fraction form
    283,067.95/390,639.72 = 155,743.78/x
  3. Step 3: Cross multiply
    283,067.95x = 390,639.72 × 155,743.78
  4. Step 4: Simplify right side
    283,067.95x = 60,839,706,610.94
  5. Step 5: Solve for x
    x = 60,839,706,610.94/283,067.95
  6. Step 6: Final answer
    x = 214,929.69

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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.