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Finding the Fourth Proportional to 485,380.80, 727,941.60 and 148,420.80

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Solution

The fourth proportional to 485,380.80, 727,941.60 and 148,420.80 is: 222,591.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,380.80 : 727,941.60 = 148,420.80 : x
  2. Step 2: Convert to fraction form
    485,380.80/727,941.60 = 148,420.80/x
  3. Step 3: Cross multiply
    485,380.80x = 727,941.60 × 148,420.80
  4. Step 4: Simplify right side
    485,380.80x = 108,041,674,625.28
  5. Step 5: Solve for x
    x = 108,041,674,625.28/485,380.80
  6. Step 6: Final answer
    x = 222,591.57

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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.