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Finding the Fourth Proportional to 521,080.60, 781,620.90 and 307,629.40

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Solution

The fourth proportional to 521,080.60, 781,620.90 and 307,629.40 is: 461,444.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,080.60 : 781,620.90 = 307,629.40 : x
  2. Step 2: Convert to fraction form
    521,080.60/781,620.90 = 307,629.40/x
  3. Step 3: Cross multiply
    521,080.60x = 781,620.90 × 307,629.40
  4. Step 4: Simplify right side
    521,080.60x = 240,449,568,494.46
  5. Step 5: Solve for x
    x = 240,449,568,494.46/521,080.60
  6. Step 6: Final answer
    x = 461,444.10

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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.