Home / 639,862.98-959,845.50-219,142.50

Finding the Fourth Proportional to 639,862.98, 959,845.50 and 219,142.50

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Solution

The fourth proportional to 639,862.98, 959,845.50 and 219,142.50 is: 328,731.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,862.98 : 959,845.50 = 219,142.50 : x
  2. Step 2: Convert to fraction form
    639,862.98/959,845.50 = 219,142.50/x
  3. Step 3: Cross multiply
    639,862.98x = 959,845.50 × 219,142.50
  4. Step 4: Simplify right side
    639,862.98x = 210,342,942,483.75
  5. Step 5: Solve for x
    x = 210,342,942,483.75/639,862.98
  6. Step 6: Final answer
    x = 328,731.23

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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.