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Finding the Fourth Proportional to 407,719.60, 611,579.40 and 341,781.55

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Solution

The fourth proportional to 407,719.60, 611,579.40 and 341,781.55 is: 512,672.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,719.60 : 611,579.40 = 341,781.55 : x
  2. Step 2: Convert to fraction form
    407,719.60/611,579.40 = 341,781.55/x
  3. Step 3: Cross multiply
    407,719.60x = 611,579.40 × 341,781.55
  4. Step 4: Simplify right side
    407,719.60x = 209,026,555,280.07
  5. Step 5: Solve for x
    x = 209,026,555,280.07/407,719.60
  6. Step 6: Final answer
    x = 512,672.33

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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.