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Finding the Fourth Proportional to 639,862.48, 959,844.75 and 219,142

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Solution

The fourth proportional to 639,862.48, 959,844.75 and 219,142 is: 328,730.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,862.48 : 959,844.75 = 219,142 : x
  2. Step 2: Convert to fraction form
    639,862.48/959,844.75 = 219,142/x
  3. Step 3: Cross multiply
    639,862.48x = 959,844.75 × 219,142
  4. Step 4: Simplify right side
    639,862.48x = 210,342,298,204.50
  5. Step 5: Solve for x
    x = 210,342,298,204.50/639,862.48
  6. Step 6: Final answer
    x = 328,730.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.