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Finding the Fourth Proportional to 545,310.60, 818,580.30 and 421,201.80

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Solution

The fourth proportional to 545,310.60, 818,580.30 and 421,201.80 is: 632,277.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,310.60 : 818,580.30 = 421,201.80 : x
  2. Step 2: Convert to fraction form
    545,310.60/818,580.30 = 421,201.80/x
  3. Step 3: Cross multiply
    545,310.60x = 818,580.30 × 421,201.80
  4. Step 4: Simplify right side
    545,310.60x = 344,787,495,804.54
  5. Step 5: Solve for x
    x = 344,787,495,804.54/545,310.60
  6. Step 6: Final answer
    x = 632,277.27

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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.