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Finding the Fourth Proportional to 417,720.60, 626,580.90 and 193,080.60

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Solution

The fourth proportional to 417,720.60, 626,580.90 and 193,080.60 is: 289,620.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,720.60 : 626,580.90 = 193,080.60 : x
  2. Step 2: Convert to fraction form
    417,720.60/626,580.90 = 193,080.60/x
  3. Step 3: Cross multiply
    417,720.60x = 626,580.90 × 193,080.60
  4. Step 4: Simplify right side
    417,720.60x = 120,980,616,120.54
  5. Step 5: Solve for x
    x = 120,980,616,120.54/417,720.60
  6. Step 6: Final answer
    x = 289,620.90

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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.