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Finding the Fourth Proportional to 283,179.78, 390,795.84 and 155,863.17

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Solution

The fourth proportional to 283,179.78, 390,795.84 and 155,863.17 is: 215,095.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,179.78 : 390,795.84 = 155,863.17 : x
  2. Step 2: Convert to fraction form
    283,179.78/390,795.84 = 155,863.17/x
  3. Step 3: Cross multiply
    283,179.78x = 390,795.84 × 155,863.17
  4. Step 4: Simplify right side
    283,179.78x = 60,910,678,445.21
  5. Step 5: Solve for x
    x = 60,910,678,445.21/283,179.78
  6. Step 6: Final answer
    x = 215,095.44

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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.