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Finding the Fourth Proportional to 408,916.60, 613,374.90 and 323,623.60

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Solution

The fourth proportional to 408,916.60, 613,374.90 and 323,623.60 is: 485,435.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,916.60 : 613,374.90 = 323,623.60 : x
  2. Step 2: Convert to fraction form
    408,916.60/613,374.90 = 323,623.60/x
  3. Step 3: Cross multiply
    408,916.60x = 613,374.90 × 323,623.60
  4. Step 4: Simplify right side
    408,916.60x = 198,502,593,287.64
  5. Step 5: Solve for x
    x = 198,502,593,287.64/408,916.60
  6. Step 6: Final answer
    x = 485,435.40

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1.5x scale

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.