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Finding the Fourth Proportional to 403,719.60, 606,891.60 and 345,982.80

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Solution

The fourth proportional to 403,719.60, 606,891.60 and 345,982.80 is: 520,098.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,719.60 : 606,891.60 = 345,982.80 : x
  2. Step 2: Convert to fraction form
    403,719.60/606,891.60 = 345,982.80/x
  3. Step 3: Cross multiply
    403,719.60x = 606,891.60 × 345,982.80
  4. Step 4: Simplify right side
    403,719.60x = 209,974,055,064.48
  5. Step 5: Solve for x
    x = 209,974,055,064.48/403,719.60
  6. Step 6: Final answer
    x = 520,098.74

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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.