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Finding the Fourth Proportional to 642,310.60, 886,443.06 and 355,920.52

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Solution

The fourth proportional to 642,310.60, 886,443.06 and 355,920.52 is: 491,200.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,310.60 : 886,443.06 = 355,920.52 : x
  2. Step 2: Convert to fraction form
    642,310.60/886,443.06 = 355,920.52/x
  3. Step 3: Cross multiply
    642,310.60x = 886,443.06 × 355,920.52
  4. Step 4: Simplify right side
    642,310.60x = 315,503,274,865.59
  5. Step 5: Solve for x
    x = 315,503,274,865.59/642,310.60
  6. Step 6: Final answer
    x = 491,200.48

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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.