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Finding the Fourth Proportional to 725,978.20, 1,086,893.70 and 651,328.60

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Solution

The fourth proportional to 725,978.20, 1,086,893.70 and 651,328.60 is: 975,132.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,978.20 : 1,086,893.70 = 651,328.60 : x
  2. Step 2: Convert to fraction form
    725,978.20/1,086,893.70 = 651,328.60/x
  3. Step 3: Cross multiply
    725,978.20x = 1,086,893.70 × 651,328.60
  4. Step 4: Simplify right side
    725,978.20x = 707,924,951,969.82
  5. Step 5: Solve for x
    x = 707,924,951,969.82/725,978.20
  6. Step 6: Final answer
    x = 975,132.52

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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.