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Finding the Fourth Proportional to 1,612.60, 2,416.20 and 789.10

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Solution

The fourth proportional to 1,612.60, 2,416.20 and 789.10 is: 1,182.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,612.60 : 2,416.20 = 789.10 : x
  2. Step 2: Convert to fraction form
    1,612.60/2,416.20 = 789.10/x
  3. Step 3: Cross multiply
    1,612.60x = 2,416.20 × 789.10
  4. Step 4: Simplify right side
    1,612.60x = 1,906,623.42
  5. Step 5: Solve for x
    x = 1,906,623.42/1,612.60
  6. Step 6: Final answer
    x = 1,182.33

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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.