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Finding the Fourth Proportional to 681,985.60, 1,022,978.40 and 615,630.40

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Solution

The fourth proportional to 681,985.60, 1,022,978.40 and 615,630.40 is: 923,445.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,985.60 : 1,022,978.40 = 615,630.40 : x
  2. Step 2: Convert to fraction form
    681,985.60/1,022,978.40 = 615,630.40/x
  3. Step 3: Cross multiply
    681,985.60x = 1,022,978.40 × 615,630.40
  4. Step 4: Simplify right side
    681,985.60x = 629,776,601,583.36
  5. Step 5: Solve for x
    x = 629,776,601,583.36/681,985.60
  6. Step 6: Final answer
    x = 923,445.60

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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.